The Library of Congress (LOC) is a

research library A research library is a library that contains an in-depth collection of material on one or several subjects.(Young, 1983; p. 188) A research library will generally include an in-depth selection of materials on a particular topic or set of top ...

in Washington, D.C., serving as the library and research service for the

United States Congress The United States Congress is the legislature, legislative branch of the federal government of the United States. It is a Bicameralism, bicameral legislature, including a Lower house, lower body, the United States House of Representatives, ...

and the ''de facto''

national library A national library is a library established by a government as a country's preeminent repository of information. Unlike public library, public libraries, these rarely allow citizens to borrow books. Often, they include numerous rare, valuable, ...

of the United States. It also administers

copyright law A copyright is a type of intellectual property that gives its owner the exclusive legal right to copy, distribute, adapt, display, and perform a creative work, usually for a limited time. The creative work may be in a literary, artistic, e ...

through the

United States Copyright Office The United States Copyright Office (USCO), a part of the Library of Congress, is a United States government body that registers copyright claims, records information about copyright ownership, provides information to the public, and assists ...

, and it houses the

Congressional Research Service The Congressional Research Service (CRS) is a public policy research institute of the United States Congress. Operating within the Library of Congress, it works primarily and directly for members of Congress and their committees and staff on a ...

. Founded in 1800, the Library of Congress is the oldest federal cultural institution in the United States. It is housed in three buildings on

Capitol Hill Capitol Hill is a neighborhoods in Washington, D.C., neighborhood in Washington, D.C., located in both the Northeast, Washington, D.C., Northeast and Southeast, Washington, D.C., Southeast quadrants. It is bounded by 14th Street SE & NE, F S ...

, adjacent to the

United States Capitol The United States Capitol, often called the Capitol or the Capitol Building, is the Seat of government, seat of the United States Congress, the United States Congress, legislative branch of the Federal government of the United States, federal g ...

, along with the

National Audio-Visual Conservation Center The National Audio-Visual Conservation Center (NAVCC) is a branch of the Library of Congress devoted to preserving the United States' audio-visual history. It includes the Packard Campus (PCAVC), opened in 2007 to store the then entire 6.3 milli ...

Culpeper, Virginia Culpeper (formerly Culpeper Courthouse, earlier Fairfax) is an incorporated town in Culpeper County, Virginia, United States. It is the county seat and part of the Washington–Baltimore–Arlington, DC–MD–VA–WV–PA Combined Statistical ...

, and additional storage facilities at

Fort George G. Meade Fort George G. Meade is a United States Army installation located in Maryland, that includes the Defense Information School, the Defense Media Activity, the United States Army Field Band, and the headquarters of United States Cyber Command, th ...

and Cabin Branch in

Hyattsville, Maryland Hyattsville is a city in Prince George's County, Maryland, United States. It is an urban suburb of Washington, D.C. The population was 21,187 at the 2020 United States census. History Before Europeans reached the area, the upper Anacostia ...

. The library's functions are overseen by the

librarian of Congress The librarian of Congress is the head of the Library of Congress, appointed by the president of the United States with the advice and consent of the United States Senate, for a term of ten years. The librarian of Congress also appoints and overs ...

, and its buildings are maintained by the

architect of the Capitol The Architect of the Capitol is the Federal government of the United States, federal Government agency, agency responsible for the maintenance, operation, development, and preservation of the United States Capitol Complex. It is an agency of t ...

. The LOC is one of the

largest libraries in the world This sortable list of largest libraries includes libraries that, as measured in 2008 or subsequently, store 10 million or more items. All figures are based on data published by the libraries themselves. As there are no universally accepted standa ...

, containing approximately 173 million items and employing over 3,000 staff. Its collections are "universal, not limited by subject, format, or national boundary, and include research materials from all parts of the world and in more than 470 languages". When

Congress A congress is a formal meeting of the representatives of different countries, constituent states, organizations, trade unions, political parties, or other groups. The term originated in Late Middle English to denote an encounter (meeting of ...

moved to Washington in November 1800, a small congressional library was housed in the Capitol. Much of the original collection was lost in the August 1814

Burning of Washington The Burning of Washington, also known as the Capture of Washington, was a successful United Kingdom of Great Britain and Ireland, British Amphibious warfare, amphibious attack conducted by Rear Admiral Sir George Cockburn, 10th Baronet, Georg ...

by the British during the

War of 1812 The War of 1812 was fought by the United States and its allies against the United Kingdom of Great Britain and Ireland, United Kingdom and its allies in North America. It began when the United States United States declaration of war on the Uni ...

. Congress accepted former president

Thomas Jefferson Thomas Jefferson (, 1743July 4, 1826) was an American Founding Fathers of the United States, Founding Father and the third president of the United States from 1801 to 1809. He was the primary author of the United States Declaration of Indepe ...

's offer to sell his entire personal collection of 6,487 books to restore the library. The collection grew slowly and suffered another major fire in 1851, which destroyed two-thirds of Jefferson's original books. The Library of Congress faced space shortages, understaffing, and lack of funding, until the American Civil War increased the importance of legislative research to meet the demands of a growing federal government. In 1870, the library gained the right to receive two copies of every copyrightable work printed in the United States; it also built its collections through acquisitions and donations. Between 1890 and 1897, a new library building, now the

Thomas Jefferson Building The Thomas Jefferson Building, also known as the Main Library, is the oldest of the Library of Congress buildings in Washington, D.C. Built between 1890 and 1897, it was initially known as the Library of Congress Building. In 1980, the building ...

, was constructed. Two additional buildings, the

John Adams Building The John Adams Building is the second-oldest of the buildings of the Library of Congress of the United States. Built in the 1930s, it is named for John Adams, the second president, who signed the law creating the Library of Congress in 1800. The ...

(opened in 1939) and the

James Madison Memorial Building The James Madison Memorial Building is one of three United States Capitol Complex buildings that house the Library of Congress. The building was constructed from 1971 to 1976, and serves as the official memorial to United States Founding Father a ...

(opened in 1980), were later added. The LOC's Congressional Research Service provides objective non-partisan research to Congress to assist it in passing legislation. The library is open to the public for research, although only members of Congress, their staff, and library employees may borrow materials for use outside the library.

History

1800–1851: Origin and Jefferson's contribution

In 1783,

James Madison James Madison (June 28, 1836) was an American statesman, diplomat, and Founding Fathers of the United States, Founding Father who served as the fourth president of the United States from 1809 to 1817. Madison was popularly acclaimed as the ...

, a

Founding Father The following is a list of national founders of sovereign states who were credited with establishing a state. National founders are typically those who played an influential role in setting up the systems of governance, (i.e., political system ...

and the nation's fourth president, proposed creating a congressional library, but failed to gain necessary support for the idea. After the

American Revolutionary War The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, was the armed conflict that comprised the final eight years of the broader American Revolution, in which Am ...

, however, the Philadelphia Library Company and

New York Society Library The New York Society Library (NYSL) is the oldest cultural institution in New York City. It was founded in 1754 by the New York Society as a subscription library. During the time when New York was the capital of the United States, it was the de ...

served as surrogate congressional libraries when Congress convened in those cities.Murray, Stuart. The Library: An Illustrated History (New York, Skyhouse Publishing, 2012): 155. On April 24, 1800, the Library of Congress was established when

John Adams John Adams (October 30, 1735 – July 4, 1826) was a Founding Fathers of the United States, Founding Father and the second president of the United States from 1797 to 1801. Before Presidency of John Adams, his presidency, he was a leader of ...

, the nation's second president, signed an

act of Congress An act of Congress is a statute enacted by the United States Congress. Acts may apply only to individual entities (called Public and private bills, private laws), or to the general public (Public and private bills, public laws). For a Bill (law) ...

, which appropriated $5,000 "for the purchase of such books as may be necessary for the use of Congress...and for fitting up a suitable apartment for containing them." Books were ordered from London, forming a collection of 740 books and three maps housed in the new

. Adams' successor as U.S. President,

, also played a crucial role in shaping development of the Library of Congress. On January 26, 1802, Jefferson signed a bill allowing the president to appoint the

and establishing a

Joint Committee on the Library The Joint Committee on the Library is a Joint Committee of the United States Congress devoted to the affairs and administration of the Library of Congress, which is the library of the federal legislature. There are five members of each house on th ...

to oversee it. The law also extended borrowing privileges to the president and vice president. In August 1814, British forces occupied Washington, D.C. and, in retaliation for American acts in Canada, burned several

government A government is the system or group of people governing an organized community, generally a State (polity), state. In the case of its broad associative definition, government normally consists of legislature, executive (government), execu ...

buildings, including the Library of Congress, resulting in the destructing of over 3,000 of its volumes. These volumes were held in the Senate wing of the Capitol; one surviving volume was a government account book from 1810. This volume was taken by British commander George Cockburn as a souvenir, which was later returned to the U.S. over a century later, in 1940, by his family. Within a month, Jefferson offered to sell his large personal library as a replacement. He had reconstituted his own collection after losing part of it to a fire. Congress accepted the offer in January 1815, appropriating $23,950 to purchase his 6,487 books. Some House members, including New Hampshire representative

Daniel Webster Daniel Webster (January 18, 1782 – October 24, 1852) was an American lawyer and statesman who represented New Hampshire and Massachusetts in the U.S. Congress and served as the 14th and 19th United States Secretary of State, U.S. secretary o ...

, opposed the purchase, wanting to exclude "books of an atheistical, irreligious, and immoral tendency". Jefferson's collection, gathered over 50 years, covered various subjects and languages, including topics not typically found in a legislative library. He believed all subjects had a place in the Library of Congress, stating:

I do not know that it contains any branch of science which Congress would wish to exclude from their collection; there is, in fact, no subject to which a Member of Congress may not have occasion to refer.

Jefferson's library was a working collection for a scholar, not for display. It doubled the size of the original library, transforming it from a specialist's library to a more general one. He organized his books based on

Francis Bacon Francis Bacon, 1st Viscount St Alban (; 22 January 1561 – 9 April 1626) was an English philosopher and statesman who served as Attorney General and Lord Chancellor of England under King James I. Bacon argued for the importance of nat ...

's organization of knowledge, grouping them into Memory, Reason, and Imagination with 44 subdivisions. The library used this scheme until the late 19th century when librarian

Herbert Putnam George Herbert Putnam (September 20, 1861 – August 14, 1955) was an American librarian. He was the eighth (and also the longest-serving) Librarian of Congress from 1899 to 1939. He implemented his vision of a universal collection with strengths ...

introduced the

Library of Congress Classification The Library of Congress Classification (LCC) is a system of library classification developed by the Library of Congress in the United States, which can be used for shelving books in a library. LCC is mainly used by large research and academic li ...

, now applying to over 138 million items. A February 24, 1824, report from the Committee of Ways and Means recommended a $5,000 appropriation for the Library of Congress, noting the need to improve its collections in "Law, Politics, Commerce, History, and Geography," which were crucial for Congress.

1851–1865: Weakening

On December 24, 1851, the largest fire in the library's history destroyed 35,000 books, two-thirds of the library's collection, and two-thirds of

's original transfer. Congress appropriated $168,700 to replace the lost books in 1852 but not to acquire new materials. (By 2008, the librarians of Congress had found replacements for all but 300 of the works that had been documented as being in Jefferson's original collection.) This marked the start of a conservative period in the library's administration by librarian

John Silva Meehan John Silva Meehan (February 6, 1790 – April 24, 1863) was an American publisher, printer, and newspaper editor. He served as the librarian of Congress from 1829 to 1861. Born in New York City, Meehan worked as a printer in his youth. He brie ...

and joint committee chairman

James A. Pearce James, Jim or Jimmy Pearce may refer to: Politics * James Pearce (American politician) (1805–1862), American senator from Maryland * James Pearce (South Australian politician) (1825–1904), House of Assembly and Legislative Council member *Jim P ...

, who restricted the library's activities. Meehan and Pearce's views about a restricted scope for the Library of Congress reflected those shared by members of Congress. While Meehan was a librarian, he supported and perpetuated the notion that "the congressional library should play a limited role on the national scene and that its collections, by and large, should emphasize American materials of obvious use to the U.S. Congress." In 1859, Congress transferred the library's public document distribution activities to the

Department of the Interior The United States Department of the Interior (DOI) is an executive department of the U.S. federal government responsible for the management and conservation of most federal lands and natural resources. It also administers programs relatin ...

and its international book exchange program to the

Department of State The United States Department of State (DOS), or simply the State Department, is an executive department of the U.S. federal government responsible for the country's foreign policy and relations. Equivalent to the ministry of foreign affairs ...

. During the 1850s,

Smithsonian Institution The Smithsonian Institution ( ), or simply the Smithsonian, is a group of museums, Education center, education and Research institute, research centers, created by the Federal government of the United States, U.S. government "for the increase a ...

librarian Charles Coffin Jewett aggressively tried to develop the Smithsonian as the United States national library. His efforts were rejected by Smithsonian secretary

Joseph Henry Joseph Henry (December 17, 1797– May 13, 1878) was an American physicist and inventor who served as the first secretary of the Smithsonian Institution. He was the secretary for the National Institute for the Promotion of Science, a precursor ...

, who advocated a focus on scientific research and publication. To reinforce his intentions for the Smithsonian, Henry established laboratories, developed a robust physical sciences library, and started the ''

Smithsonian Contributions to Knowledge The Smithsonian Contributions and Studies Series is a collection of serial periodical publications produced by the Smithsonian Institution, detailing advances in various scientific and societal fields to which the Smithsonian Institution has made ...

'', the first of many publications intended to disseminate research results. For Henry, the Library of Congress was the obvious choice as the national library. Unable to resolve the conflict, Henry dismissed Jewett in July 1854. In 1865, the Smithsonian building, also called the Castle due to its Norman architectural style, was severely damaged by fire. This incident presented Henry with an opportunity related to the Smithsonian's non-scientific library. Around this time, the Library of Congress was planning to build and relocate to the new

, designed to be fireproof. Authorized by an act of Congress, Henry transferred the Smithsonian's non-scientific library of 40,000 volumes to the Library of Congress in 1866. In 1861, President

Abraham Lincoln Abraham Lincoln (February 12, 1809 – April 15, 1865) was the 16th president of the United States, serving from 1861 until Assassination of Abraham Lincoln, his assassination in 1865. He led the United States through the American Civil War ...

appointed

John G. Stephenson John Gould Stephenson (March 1, 1828 – November 11, 1883) was an American physician and soldier who served as Librarian of Congress from 1861 to 1864. Born in Lancaster, New Hampshire, to a prominent merchant family, he attended the Dartmouth ...

Librarian of Congress The librarian of Congress is the head of the Library of Congress, appointed by the president of the United States with the advice and consent of the United States Senate, for a term of ten years. The librarian of Congress also appoints and overs ...

; the appointment is regarded as the most political to date. Stephenson was a physician and spent equal time serving as librarian and as a physician in the Union Army. He could manage this division of interest because he hired Ainsworth Rand Spofford as his assistant. Despite his new job, Stephenson focused on the war. Three weeks into his term as Librarian of Congress, he left Washington, D.C., to serve as a volunteer aide-de-camp at the battles of Chancellorsville and Gettysburg during the

American Civil War The American Civil War (April 12, 1861May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States between the Union (American Civil War), Union ("the North") and the Confederate States of A ...

. Stephenson's hiring of Spofford, who directed the library in his absence, may have been his most significant achievement.

1865–1897: Spofford's expansion

Librarian Ainsworth Rand Spofford, who directed the Library of Congress from 1865 to 1897, built broad bipartisan support to develop it as a national library and a legislative resource. He was aided by expansion of the federal government after the war and a favorable political climate. He began comprehensively collecting Americana and

American literature American literature is literature written or produced in the United States of America and in the British colonies that preceded it. The American literary tradition is part of the broader tradition of English-language literature, but also ...

, led the construction of a new building to house the library, and transformed the librarian of Congress position into one of strength and independence. Between 1865 and 1870, Congress appropriated funds for the construction of the

, placed all

copyright registration The purpose of copyright registration is to place on record a verifiable account of the date and content of the work in question, so that in the event of a legal claim, or case of infringement or plagiarism, the copyright owner can produce a cop ...

and deposit activities under the library's control, and restored the international book exchange. The library also acquired the vast libraries of the Smithsonian and of historian

Peter Force Peter Force (November 26, 1790 – January 23, 1868) was an American politician, newspaper editor, printer, archivist, and early American historian. He was twice elected the twelfth Mayor of Washington D.C. During his lifetime he am ...

, strengthening its scientific and Americana collections significantly. By 1876, the Library of Congress had 300,000 volumes; it was tied with the

Boston Public Library The Boston Public Library is a municipal public library system in Boston, Massachusetts, founded in 1848. The Boston Public Library is also Massachusetts' Library for the Commonwealth (formerly ''library of last recourse''), meaning all adult re ...

as the nation's largest library. It moved from the Capitol building to its new headquarters in 1897 with more than 840,000 volumes, 40 percent of which had been acquired through copyright deposit. A year before the library's relocation, the Joint Library Committee held hearings to assess the condition of the library and plan for its future growth and possible reorganization. Spofford and six experts sent by the

American Library Association The American Library Association (ALA) is a nonprofit organization based in the United States that promotes libraries and library education internationally. It is the oldest and largest library association in the world. History 19th century ...

testified that the library should continue its expansion to become a true national library. Based on the hearings, Congress authorized a budget that allowed the library to more than double its staff, from 42 to 108 persons. Senators Justin Morrill of Vermont and

Daniel W. Voorhees Daniel Wolsey Voorhees (September 26, 1827April 10, 1897) was an American lawyer and politician who served as a United States Senator from Indiana from 1877 to 1897. He was the leader of the Democratic Party and an anti-war Copperhead during ...

of Indiana were particularly helpful in gaining this support. The library also established new administrative units for all aspects of the collection. In its bill, Congress strengthened the role of librarian of Congress: it became responsible for governing the library and making staff appointments. As with presidential Cabinet appointments, the Senate was required to approve presidential appointees to the position. In 1893, Elizabeth Dwyer became the first woman to be appointed to the staff of the library.

1897–1939: Post-reorganization

With this support and the 1897 reorganization upon moving into its new home, the Library of Congress began to grow and develop more rapidly. Librarian Spofford's successor John Russell Young overhauled the library's bureaucracy, used his connections as a former diplomat to acquire more materials from around the world, and established the library's first assistance programs for the blind and physically disabled, with the establishment of the National Library Service for the Blind and Print Disabled. Librarian Young's successor

held the office for forty years of the 20th century from 1899 to 1939. Two years after he took office, the library became the first in the United States to hold one million volumes. Putnam focused his efforts to make the library more accessible and useful for the public and for other libraries. He instituted the

interlibrary loan Inter-library loan (abbreviated ILL, sometimes called document delivery, document supply, inter-lending, inter-library services, inter-loan, or resource sharing) is a service that enables patrons of one library to borrow materials that are held by ...

service, transforming the Library of Congress into what he referred to as a "library of last resort". Putnam also expanded library access to "scientific investigators and duly qualified individuals", and began publishing

primary sources In the study of history as an academic discipline, a primary source (also called an original source) is an artifact, document, diary, manuscript, autobiography, recording, or any other source of information that was created at the time under ...

for the benefit of scholars. During Putnam's tenure, the library broadened the diversity of its acquisitions. In 1903, Putnam persuaded President

Theodore Roosevelt Theodore Roosevelt Jr. (October 27, 1858 – January 6, 1919), also known as Teddy or T.R., was the 26th president of the United States, serving from 1901 to 1909. Roosevelt previously was involved in New York (state), New York politics, incl ...

to use an executive order to transfer the papers of the

Founding Fathers The Founding Fathers of the United States, often simply referred to as the Founding Fathers or the Founders, were a group of late-18th-century American revolutionary leaders who united the Thirteen Colonies, oversaw the War of Independence ...

from the State Department to the Library of Congress. Putnam also expanded foreign acquisitions, including the 1904 purchase of a 4,000-volume library of Indica, the 1906 purchase of G. V. Yudin's 80,000-volume Russian library, the 1908 Schatz collection of early opera

libretto A libretto (From the Italian word , ) is the text used in, or intended for, an extended musical work such as an opera, operetta, masque, oratorio, cantata or Musical theatre, musical. The term ''libretto'' is also sometimes used to refer to th ...

s, and the early 1930s purchase of the Russian Imperial Collection, consisting of 2,600 volumes from the library of the

Romanov family The House of Romanov (also transliterated as Romanoff; , ) was the reigning imperial house of Russia from 1613 to 1917. They achieved prominence after Anastasia Romanovna married Ivan the Terrible, the first crowned tsar of all Russia. Ni ...

on a variety of topics. Collections of

Hebraica Hebrew (; ''ʿÎbrit'') is a Northwest Semitic language within the Afroasiatic language family. A regional dialect of the Canaanite languages, it was natively spoken by the Israelites and remained in regular use as a first language until ...

, Chinese, and Japanese works were also acquired. On one occasion, Congress initiated an acquisition: in 1929 Congressman Ross Collins (D-Mississippi) gained approval for the library to purchase Otto Vollbehr's collection of

incunabula An incunable or incunabulum (: incunables or incunabula, respectively) is a book, pamphlet, or broadside (printing), broadside that was printed in the earliest stages of printing in Europe, up to the year 1500. The specific date is essentiall ...

for $1.5 million. This collection included one of three remaining perfect

vellum Vellum is prepared animal skin or membrane, typically used as writing material. It is often distinguished from parchment, either by being made from calfskin (rather than the skin of other animals), or simply by being of a higher quality. Vellu ...

copies of the

Gutenberg Bible The Gutenberg Bible, also known as the 42-line Bible, the Mazarin Bible or the B42, was the earliest major book printed in Europe using mass-produced metal movable type. It marked the start of the "Printing Revolution, Gutenberg Revolution" an ...

Putnam established the

Legislative Reference Service The Congressional Research Service (CRS) is a public policy research institute of the United States Congress. Operating within the Library of Congress, it works primarily and directly for members of Congress and their committees and staff on a c ...

(LRS) in 1914 as a separative administrative unit of the library. Based on the

Progressive Era The Progressive Era (1890s–1920s) was a period in the United States characterized by multiple social and political reform efforts. Reformers during this era, known as progressivism in the United States, Progressives, sought to address iss ...

's philosophy of science to be used to solve problems, and modeled after successful research branches of state legislatures, the LRS would provide informed answers to Congressional research inquiries on almost any topic. Congress passed in 1925 an act allowing the Library of Congress to establish a trust fund board to accept donations and endowments, giving the library a role as a

patron of the arts Patronage is the support, encouragement, privilege, or financial aid that an organization or individual bestows on another. In the history of art, art patronage refers to the support that princes, popes, and other wealthy and influential people ...

. The library received donations and endowments by such prominent wealthy individuals as

John D. Rockefeller John Davison Rockefeller Sr. (July 8, 1839 – May 23, 1937) was an American businessman and philanthropist. He was one of the List of richest Americans in history, wealthiest Americans of all time and one of the richest people in modern hist ...

, James B. Wilbur, and

Archer M. Huntington Archer Milton Huntington (March 10, 1870 – December 11, 1955) was an American philanthropist and scholar, primarily known for his contributions to the field of Hispanic studies. He founded the Hispanic Society of America in New York City, an ...

. Gertrude Clarke Whittall donated five Stradivarius violins to the library.

Elizabeth Sprague Coolidge Elizabeth Sprague Coolidge (October 30, 1864 – November 4, 1953), born Elizabeth Penn Sprague, was an American pianist and patron of music, especially of chamber music. Biography Elizabeth Sprague Coolidge's father was a wealthy wholesale ...

's donations paid for a

concert hall A concert hall is a cultural building with a stage (theatre), stage that serves as a performance venue and an auditorium filled with seats. This list does not include other venues such as sports stadia, dramatic theatres or convention ...

to be constructed within the Library of Congress building and an

honorarium An honorarium is an '' ex gratia'' payment, i.e., a payment made, without the giver recognizing themself as having any liability or legal obligation to the recipient for their volunteered services, or for services for which fees are not tradition ...

established for the Music Division to pay live performers for concerts. A number of chairs and consultantships were established from the donations, the most well-known of which is the Poet Laureate Consultant. The library's expansion eventually filled the library's Main Building, although it used shelving expansions in 1910 and 1927. The library needed to expand into a new structure. Congress acquired nearby land in 1928 and approved construction of the Annex Building (later known as the

) in 1930. Although delayed during the Depression years, it was completed in 1938 and opened to the public in 1939.

1939–1987: National versus legislative role

In 1939, following Putnam's retirement, President

Franklin D. Roosevelt Franklin Delano Roosevelt (January 30, 1882April 12, 1945), also known as FDR, was the 32nd president of the United States, serving from 1933 until his death in 1945. He is the longest-serving U.S. president, and the only one to have served ...

appointed poet and writer

Archibald MacLeish Archibald MacLeish (May 7, 1892 – April 20, 1982) was an American poet and writer, who was associated with the modernist school of poetry. MacLeish studied English at Yale University and law at Harvard University. He enlisted in and saw action ...

as his successor. Occupying the post from 1939 to 1944 during the height of

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

, MacLeish became the most widely known librarian of Congress in the library's history. MacLeish encouraged librarians to oppose

totalitarianism Totalitarianism is a political system and a form of government that prohibits opposition from political parties, disregards and outlaws the political claims of individual and group opposition to the state, and completely controls the public s ...

on behalf of democracy; dedicated the South Reading Room of the Adams Building to Thomas Jefferson, and commissioned artist

Ezra Winter Ezra Augustus Winter (March 10, 1886 – April 6, 1949) was a prominent American muralist. Biography Winter was born in Traverse City, Michigan, trained at the Chicago Academy of Fine Arts in 1908, and the American Academy in Rome in 1914. Winte ...

to paint four themed murals for the room. He established a "democracy alcove" in the Main Reading Room of the Jefferson Building for essential documents such as the Declaration of Independence, the Constitution, and ''

The Federalist Papers ''The Federalist Papers'' is a collection of 85 articles and essays written by Alexander Hamilton, James Madison, and John Jay under the collective pseudonym "Publius" to promote the ratification of the Constitution of the United States. The ...

''. The Library of Congress assisted during the war effort, ranging from storage of the

Declaration of Independence A declaration of independence is an assertion by a polity in a defined territory that it is independent and constitutes a state. Such places are usually declared from part or all of the territory of another state or failed state, or are breaka ...

and the

United States Constitution The Constitution of the United States is the Supremacy Clause, supreme law of the United States, United States of America. It superseded the Articles of Confederation, the nation's first constitution, on March 4, 1789. Originally includi ...

Fort Knox Fort Knox is a United States Army installation in Kentucky, south of Louisville and north of Elizabethtown, Kentucky, Elizabethtown. It is adjacent to the United States Bullion Depository (also known as Fort Knox), which is used to house a larg ...

for safekeeping to researching weather data on the

Himalayas The Himalayas, or Himalaya ( ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the Earth's highest peaks, including the highest, Mount Everest. More than list of h ...

for

Air Force An air force in the broadest sense is the national military branch that primarily conducts aerial warfare. More specifically, it is the branch of a nation's armed services that is responsible for aerial warfare as distinct from an army aviati ...

pilots. MacLeish resigned in 1944 when appointed as Assistant Secretary of State. President

Harry Truman Harry S. Truman (May 8, 1884December 26, 1972) was the 33rd president of the United States, serving from 1945 to 1953. As the 34th vice president in 1945, he assumed the presidency upon the death of Franklin D. Roosevelt that year. Subsequen ...

appointed

Luther H. Evans Luther Harris Evans (13 October 1902 – 23 December 1981) was an American political scientist who served as the tenth Librarian of Congress and third Director-General of UNESCO. Early life and career Born in Sayersville in Bastrop County, Tex ...

as Librarian of Congress. Evans, who served until 1953, expanded the library's acquisitions, cataloging, and bibliographic services. But he is best known for creating Library of Congress Missions worldwide. Missions played a variety of roles in the postwar world: the mission in San Francisco assisted participants in the

meeting that established the United Nations The United Nations Conference on International Organization (UNCIO), commonly known as the San Francisco Conference, was a convention of delegates from 50 Allied nations that took place from 25 April 1945 to 26 June 1945 in San Francisco, Cal ...

, the mission in Europe acquired European publications for the Library of Congress and other American libraries, and the mission in Japan aided in the creation of the

National Diet Library The is the national library of Japan and among the largest libraries in the world. It was established in 1948 for the purpose of assisting members of the in researching matters of public policy. The library is similar in purpose and scope to ...

. Evans' successor

Lawrence Quincy Mumford Lawrence Quincy Mumford (11 December 1903 – 15 August 1982) was an American librarian. He was the eleventh Librarian of the United States Congress from 1954 to 1974. Biography Mumford was born in Hanrahan, North Carolina, to Jacob Edward Mumfo ...

took over in 1953. During his tenure, lasting until 1974, Mumford directed the initiation of construction of the

, the third Library of Congress building on Capitol Hill. Mumford led the library during the government's increased educational spending. The library was able to establish new acquisition centers abroad, including in

Cairo Cairo ( ; , ) is the Capital city, capital and largest city of Egypt and the Cairo Governorate, being home to more than 10 million people. It is also part of the List of urban agglomerations in Africa, largest urban agglomeration in Africa, L ...

and New Delhi. In 1967, the library began experimenting with

book preservation The conservation and restoration of books, manuscripts, documents, and ephemera is an activity dedicated to extending the life of items of historical and personal value made primarily from paper, parchment, and leather. When applied to cultural ...

techniques through a Preservation Office. This has developed as the most extensive library research and conservation effort in the United States. During Mumford's administration, the last significant public debate occurred about the Library of Congress's role as both a legislative and national library. Asked by Joint Library Committee chairman Senator

Claiborne Pell Claiborne de Borda Pell (November 22, 1918 – January 1, 2009) was an American politician and writer who served as a U.S. Senator from Rhode Island for six terms from 1961 to 1997. He was the sponsor of the 1972 bill that reformed the Basic ...

(D-RI) to assess operations and make recommendations, Douglas Bryant of

Harvard University Library Harvard Library is the network of libraries and services at Harvard University, a private Ivy League university in Cambridge, Massachusetts. Harvard Library is the oldest library system in the United States and both the largest academic librar ...

proposed several institutional reforms. These included expanding national activities and services and various organizational changes, all of which would emphasize the library's federal role rather than its legislative role. Bryant suggested changing the name of the Library of Congress, a recommendation rebuked by Mumford as "unspeakable violence to tradition." The debate continued within the library community for some time. The

Legislative Reorganization Act of 1970 The Legislative Reorganization Act of 1970 () was an act of the United States Congress to "improve the operation of the legislative branch of the Federal Government, and for other purposes." The act focused mainly on the rules that governed congre ...

renewed emphasis for the library on its legislative roles, requiring a greater focus on research for Congress and congressional committees, and renaming the Legislative Reference Service as the

After Mumford retired in 1974, President

Gerald Ford Gerald Rudolph Ford Jr. (born Leslie Lynch King Jr.; July 14, 1913December 26, 2006) was the 38th president of the United States, serving from 1974 to 1977. A member of the Republican Party (United States), Republican Party, Ford assumed the p ...

appointed historian Daniel J. Boorstin as a librarian. Boorstin's first challenge was to manage the relocation of some sections to the new Madison Building, which took place between 1980 and 1982. With this accomplished, Boorstin focused on other areas of library administration, such as acquisitions and collections. Taking advantage of steady budgetary growth, from $116 million in 1975 to over $250 million by 1987, Boorstin enhanced institutional and staff ties with scholars, authors, publishers, cultural leaders, and the business community. His activities changed the post of librarian of Congress so that by the time he retired in 1987, ''

The New York Times ''The New York Times'' (''NYT'') is an American daily newspaper based in New York City. ''The New York Times'' covers domestic, national, and international news, and publishes opinion pieces, investigative reports, and reviews. As one of ...

'' called this office "perhaps the leading intellectual public position in the nation."

1987–2015 Billington leadership, digitization and programs

In 1987, President

Ronald Reagan Ronald Wilson Reagan (February 6, 1911 – June 5, 2004) was an American politician and actor who served as the 40th president of the United States from 1981 to 1989. He was a member of the Republican Party (United States), Republican Party a ...

nominated historian James H. Billington as the thirteenth librarian of Congress, and the

U.S. Senate The United States Senate is a chamber of the bicameral United States Congress; it is the upper house, with the U.S. House of Representatives being the lower house. Together, the Senate and House have the authority under Article One of the ...

unanimously confirmed the appointment. Under Billington's leadership, the library doubled the size of its analog collections from 85.5 million items in 1987 to more than 160 million items in 2014. At the same time, it established new programs and employed new technologies to "get the champagne out of the bottle". These included: *

American Memory American Memory is an Internet-based archive for public domain image resources, audio, video, and archived Web content. Published by the Library of Congress, the archive launched on October 13, 1994, after $13 million was raised in private donati ...

created in 1990, which became the National Digital Library in 1994. It provides free access online to digitized American history and culture resources, including

primary source In the study of history as an academic discipline, a primary source (also called an original source) is an Artifact (archaeology), artifact, document, diary, manuscript, autobiography, recording, or any other source of information that was cre ...

s, with curatorial explanations to support use in

K-12 education K-1 is a professional kickboxing promotion established in 1993 by karateka Kazuyoshi Ishii. Originally under the ownership of the Fighting and Entertainment Group (FEG), K-1 was considered to be the largest Kickboxing organization in the world. ...

. * THOMAS.gov website launched in 1994 to provide free public access to U.S. federal legislative information with ongoing updates; and

Congress.gov Congress.gov is the online database of United States Congress legislative information. Congress.gov is a joint project of the Library of Congress, the House, the Senate and the Government Publishing Office. Congress.gov was in beta in 2012, and ...

website to provide a state-of-the-art framework for both Congress and the public in 2012; *

National Book Festival The National Book Festival is an annual literary festival held in Washington, D.C. in the United States; it is organized and sponsored by the Library of Congress, and was founded by Laura Bush and James H. Billington in 2001. Background In 19 ...

, founded in 2001 with First Lady

Laura Bush Laura Lane Welch Bush (née Welch; born November 4, 1946) is an American educator who was the first lady of the United States from 2001 to 2009 as the wife of George W. Bush, the 43rd president of the United States. Bush was previously the fir ...

, has attracted more than 1,000 authors and a million guests to the

National Mall The National Mall is a Landscape architecture, landscaped park near the Downtown, Washington, D.C., downtown area of Washington, D.C., the capital city of the United States. It contains and borders a number of museums of the Smithsonian Institu ...

and the

Washington Convention Center The Washington Convention Center in Washington, D.C. was a convention center located at 909 H Street NW, occupying the city block bounded by New York Avenue (Washington, D.C.), New York Avenue, 9th Street, H Street, and 11th Street.David Rubenstein David Mark Rubenstein (born August 11, 1949) is an American lawyer, businessman, and philanthropist. A former government official, he is a co-founder and co-chairman of the Carlyle Group,Library of Congress Literacy Awards to recognize and support achievements in improving literacy in the U.S. and abroad; * Kluge Center, started with a grant of $60 million from John W. Kluge in 2000, brings international scholars and researchers to use library resources and to interact with policymakers and the public. It hosts public lectures and scholarly events, provides endowed Kluge fellowships, and awards the Kluge Prize for the Study of Humanity (now worth $1.5 million), the first Nobel-level international prize for lifetime achievement in the humanities and social sciences (subjects not included in the Nobel awards); *

Open World Leadership Center Open World is a ten-day program administered by the Congressional Office for International Leadership that brings emerging leaders from Eurasia to the United States to engage with professional counterparts. The program was established in 1999 to fo ...

, established in 2000; by 2015 this program administered 23,000 professional exchanges for emerging post-Soviet leaders in Russia, Ukraine, and other successor states of the former

USSR The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...

. Open World began as a Library of Congress project, and later was established as an independent agency in the legislative branch. * Veterans History Project, congressionally mandated in 2000 to collect, preserve, and make accessible the personal accounts of American war veterans from

World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...

to the present day; *

opened in 2007 at a 45-acre site in

, established with a gift of more than $150 million by the

Packard Humanities Institute The Packard Humanities Institute (PHI) is a non-profit foundation, established in 1987, and located in Los Altos, California, which funds projects in a wide range of conservation concerns in the fields of archaeology, music, film preservation, ...

, and $82.1 million in additional support from Congress. Since 1988, the library has administered the

National Film Preservation Board The United States National Film Preservation Board (NFPB) is the board selecting films for preservation in the Library of Congress' National Film Registry. It was established by the National Film Preservation Act of 1988. The National Film Regis ...

. Established by congressional mandate, it selects twenty-five American films annually for preservation and inclusion in the

National Film Registry The National Film Registry (NFR) is the United States National Film Preservation Board's (NFPB) collection of films selected for preservation (library and archival science), preservation, each selected for its cultural, historical, and aestheti ...

, a collection of American films, for which the Library of Congress accepts nominations each year. There also exists a

National Recording Registry The National Recording Registry is a list of sound recordings that "are culturally, historically, or aesthetically significant, and inform or reflect life in the United States." The registry was established by the National Recording Preservation ...

administered by the

National Recording Preservation Board The United States National Recording Preservation Board selects recorded sounds for preservation in the Library of Congress' National Recording Registry. The National Recording Registry was initiated to maintain and preserve "sound recordings tha ...

that serves a similar purpose for music and sound recordings. The library has made some of these available on the Internet for free streaming and additionally has provided brief essays on the films that have been added to the registry. By 2015, the librarian had named 650 films to the registry. The films in the collection date from the earliest period to ones produced more than ten years ago; they are selected from nominations submitted to the board. Further programs included: *

Gershwin Prize for Popular Song The Library of Congress Gershwin Prize for Popular Song is an award given to a composer or performer for their lifetime contributions to popular music. Created in 2007 by the United States Library of Congress, the prize is named after brothers ...

, was launched in 2007 to honor the work of an artist whose career reflects lifetime achievement in song composition. Winners have included

Paul Simon Paul Frederic Simon (born October 13, 1941) is an American singer-songwriter known for his solo work and his collaborations with Art Garfunkel. He and Garfunkel, whom he met in elementary school in 1953, came to prominence in the 1960s as Sim ...

Stevie Wonder Stevland Hardaway Morris (; Judkins; born May 13, 1950), known professionally as Stevie Wonder, is an American and Ghanaian singer-songwriter, musician, and record producer. He is regarded as one of the most influential musicians of the 20th c ...

Paul McCartney Sir James Paul McCartney (born 18 June 1942) is an English singer, songwriter and musician who gained global fame with the Beatles, for whom he played bass guitar and the piano, and shared primary songwriting and lead vocal duties with John ...

Burt Bacharach Burt Freeman Bacharach ( ; May 12, 1928 – February 8, 2023) was an American composer, songwriter, record producer, and pianist who is widely regarded as one of the most important and influential figures of 20th-century popular music. Start ...

and

Hal David Harold Lane David (May 25, 1921 – September 1, 2012) was an American lyricist. He was best known for his collaborations with composer Burt Bacharach and his association with Dionne Warwick. Early life David was born and raised in New ...

Carole King Carole King Klein (born Carol Joan Klein; February 9, 1942) is an American singer-songwriter and musician renowned for her extensive contributions to popular music. She wrote or co-wrote 118 songs that charted on the Billboard Hot 100, ''Billbo ...

Billy Joel William Martin Joel (born May 9, 1949) is an American singer, songwriter, and pianist. Nicknamed the "Honorific nicknames in popular music, Piano Man" after his Signature song, signature 1973 song Piano Man (song), of the same name, Joel has ha ...

, and

Willie Nelson Willie Hugh Nelson (born April 29, 1933) is an American singer, guitarist, songwriter, actor and activist. He was one of the main figures of the outlaw country subgenre that developed in the late 1960s as a reaction to the conservative restr ...

, as of 2015. The library also launched the Living Legend Awards in 2000 to honor artists, activists, filmmakers, and others who have contributed to America's diverse cultural, scientific, and social heritage; *Fiction Prize (now the

Library of Congress Prize for American Fiction Library of Congress Prize for American Fiction (formerly the Library of Congress Creative Achievement Award for Fiction and Library of Congress Lifetime Achievement Award for the Writing of Fiction) is an annual book award presented by the Librarian ...

) was started in 2008 to recognize distinguished lifetime achievement in the writing of fiction. *

World Digital Library The World Digital Library (WDL) is an international digital library operated by UNESCO and the United States Library of Congress. The WDL has stated that its mission is to promote international and intercultural understanding, expand the volume ...

, established in association with

UNESCO The United Nations Educational, Scientific and Cultural Organization (UNESCO ) is a List of specialized agencies of the United Nations, specialized agency of the United Nations (UN) with the aim of promoting world peace and International secur ...

and 181 partners in 81 countries in 2009, makes copies of professionally curated primary materials of the world's varied cultures freely available online in multiple languages. *National Jukebox, launched in 2011, provides streaming free online access to more than 10,000 out-of-print music and spoken-word recordings. *BARD was started in 2013; it is a digital, talking books

mobile app A mobile application or app is a computer program or software application designed to run on a mobile device such as a smartphone, phone, tablet computer, tablet, or smartwatch, watch. Mobile applications often stand in contrast to desktop appli ...

for

braille Braille ( , ) is a Tactile alphabet, tactile writing system used by blindness, blind or visually impaired people. It can be read either on embossed paper or by using refreshable braille displays that connect to computers and smartphone device ...

and audio reading downloads, in partnership with the library's National Library Service for the Blind and Print Disabled. It enables free downloads of audio and braille books to mobile devices via the

Apple App Store The App Store is an app marketplace developed and maintained by Apple, for mobile apps on its iOS and iPadOS operating systems. The store allows users to browse and download approved apps developed within Apple's iOS SDK. Apps can be download ...

. During Billington's tenure, the library acquired General Lafayette's papers in 1996 from a castle at La Grange, France; they had previously been inaccessible. It also acquired the only copy of the 1507 Waldseemüller world map ("America's birth certificate") in 2003; it is on permanent display in the library's Thomas Jefferson Building. Using privately raised funds, the Library of Congress has created a reconstruction of Thomas Jefferson's original library. This has been on permanent display in the Jefferson building since 2008. Minerva of Peace

Under Billington, public spaces of the Jefferson Building were enlarged and technologically enhanced to serve as a national exhibition venue. It has hosted more than 100 exhibitions. These included exhibits on the

Vatican Library The Vatican Apostolic Library (, ), more commonly known as the Vatican Library or informally as the Vat, is the library of the Holy See, located in Vatican City, and is the city-state's national library. It was formally established in 1475, alth ...

and the , several on the Civil War and Lincoln, on African-American culture, on Religion and the founding of the American Republic, the Early Americas (the Kislak Collection became a permanent display), on the global celebration commemorating the 800th anniversary of

Magna Carta (Medieval Latin for "Great Charter"), sometimes spelled Magna Charta, is a royal charter of rights agreed to by King John of England at Runnymede, near Windsor, on 15 June 1215. First drafted by the Archbishop of Canterbury, Cardin ...

, and on early American printing, featuring the Rubenstein

Bay Psalm Book ''The Whole Booke of Psalmes Faithfully Translated into English Metre'', commonly called the ''Bay Psalm Book'', is a metrical psalter first printed in 1640 in Cambridge, Massachusetts, Cambridge, Massachusetts Bay Colony, Colony of Massachusett ...

. Onsite access to the Library of Congress has been increased. Billington gained an underground connection between the new U.S. Capitol Visitors Center and the library in 2008 to increase both congressional usage and public tours of the library's Thomas Jefferson Building. In 2001, the library began a

mass deacidification Mass deacidification is a term used in library and information science as one possible measure against the degradation of paper in old books, the so-called " slow fires". The goal of the process is to increase the pH of acidic paper. Although ac ...

program, to extend the lifespan of almost 4 million volumes and 12 million manuscript sheets. In 2002, a new storage facility was completed at

Fort Meade, Maryland Fort Meade is a census-designated place (CDP) in Anne Arundel County, Maryland, United States. The population was 9,324 at the 2020 census. It is the home to the National Security Agency, Central Security Service, United States Cyber Command an ...

, where a collection of storage modules have preserved and made accessible more than 4 million items from the library's analog collections. Billington established the Library Collections Security Oversight Committee in 1992 to improve protection of the collections, and also the Library of Congress Congressional Caucus in 2008 to draw attention to the library's curators and collections. He created the library's first Young Readers Center in the Jefferson Building in 2009, and the first large-scale summer intern (Junior Fellows) program for university students in 1991. Under Billington, the library sponsored the Gateway to Knowledge in 2010 to 2011, a mobile exhibition to ninety sites, covering all states east of the Mississippi, in a specially designed eighteen-wheel truck. This increased public access to library collections off-site, particularly for rural populations, and helped raise awareness of what was also available online. Billington raised more than half a billion dollars of private support to supplement Congressional appropriations for library collections, programs, and digital outreach. These private funds helped the library to continue its growth and outreach in the face of a 30% decrease in staffing, caused mainly by legislative appropriations cutbacks. He created the library's first development office for private fundraising in 1987. In 1990, he established the James Madison Council, the library's first national private sector donor-support group. In 1987, Billington also asked the

Government Accountability Office The United States Government Accountability Office (GAO) is an independent, nonpartisan government agency within the legislative branch that provides auditing, evaluative, and investigative services for the United States Congress. It is the s ...

(GAO) to conduct the first library-wide audit. He created the first

Office of the Inspector General In the United States, Office of Inspector General (OIG) is a generic term for the oversight division of a List of federal agencies in the United States, federal or state agency aimed at preventing inefficient or unlawful operations within their p ...

at the library to provide regular, independent reviews of library operations. This precedent has resulted in regular annual financial audits at the library; it has received unmodified ("clean") opinions from 1995 onward. In April 2010, the library announced plans to archive all public communication on Twitter, including all communication since Twitter's launch in March 2006. , the Twitter archive remains unfinished. Before retiring in 2015, after 28 years of service, Billington had come "under pressure" as librarian of Congress. This followed a GAO report that described a "work environment lacking central oversight" and faulted Billington for "ignoring repeated calls to hire a chief information officer, as required by law." When Billington announced his plans to retire in 2015, commentator

George Weigel George Weigel (born 1951) is an American Catholic neoconservative author, political analyst, and social activist. He currently serves as a distinguished senior fellow of the Ethics and Public Policy Center. Weigel was the founding president of th ...

described the Library of Congress as "one of the last refuges in Washington of serious bipartisanship and calm, considered conversation", and "one of the world's greatest cultural centers".

2016–2025 Hayden leadership

Appointed in 2016 by President

Barack Obama Barack Hussein Obama II (born August 4, 1961) is an American politician who was the 44th president of the United States from 2009 to 2017. A member of the Democratic Party, he was the first African American president in American history. O ...

, Carla D. Hayden was sworn in as the fourteenth librarian of Congress on September 14, 2016. She is the first professional librarian to hold the post since 1974, holding a Ph.D. in

library science Library and information science (LIS)Library and Information Sciences is the name used in the Dewey Decimal Classification for class 20 from the 18th edition (1971) to the 22nd edition (2003). are two interconnected disciplines that deal with info ...

from the

University of Chicago The University of Chicago (UChicago, Chicago, or UChi) is a Private university, private research university in Chicago, Illinois, United States. Its main campus is in the Hyde Park, Chicago, Hyde Park neighborhood on Chicago's South Side, Chic ...

. She was the

CEO A chief executive officer (CEO), also known as a chief executive or managing director, is the top-ranking corporate officer charged with the management of an organization, usually a company or a nonprofit organization. CEOs find roles in variou ...

Enoch Pratt Free Library The Enoch Pratt Free Library is the free public library system of Baltimore, Maryland. Its Central Library is located on 400 Cathedral Street (southbound) and occupies the northeastern three quarters of a city block bounded by West Franklin S ...

Baltimore Baltimore is the most populous city in the U.S. state of Maryland. With a population of 585,708 at the 2020 census and estimated at 568,271 in 2024, it is the 30th-most populous U.S. city. The Baltimore metropolitan area is the 20th-large ...

, Maryland, from 1993 until 2016, and president of the

(ALA) from 2003 to 2004. She also is the first woman and the first African American to hold the position. She continued the work of digitizing as much as possible of the collection and of expanding electronic access to the collection. She initiated programs to modernize the library, expand access from rural areas, and expanding the infrastructure and technological capacity of the library and assessment of her leadership of the library by the community reflects her expressed goals. The

Association of Research Libraries The Association of Research Libraries (ARL) is a nonprofit organization of 125 research library at comprehensive, research institutions in Canada and the United States. ARL member libraries make up a large portion of the academic and research li ...

noted Hayden's transformation of the library "into a more open, accessible, and celebrated U.S. institution, while reaffirming its role as the people’s library". The

characterized Hayden as a "wise and faithful steward of the Library of Congress – the library she has called our 'national treasure'".

In 2017, Hayden announced the Librarian-in-Residence program, which aims to support the future generation of librarians by giving them the opportunity to gain work experience in five different areas of librarianship, including: Acquisitions/Collection Development, Cataloging/Metadata, and Collection Preservation. On January 6, 2021, at 1:11 pm EST, the Library's Madison Building and the

Cannon House Office Building The Cannon House Office Building, often called the "Old House Office Building", completed in 1908, is the oldest office building of the United States Congress in Washington, D.C. A significant example of the Beaux-Arts style of architecture, it ...

were the first buildings in the Capitol Complex to be ordered to evacuate as rioters breached security perimeters before storming the Capitol building. Hayden clarified two days later that rioters did not breach any of the Library buildings or collections and all staff members were safely evacuated. On February 14, 2023, Hayden announced that the

Lilly Endowment Lilly Endowment Inc., headquartered in Indianapolis, Indiana, is one of the world's largest private philanthropic foundations and among the largest endowments in the United States. It was founded in 1937 by Josiah K. (J. K.) Lilly Sr. and his s ...

gifted the library with $2.5 million as a five-year grant to "launch programs that foster greater understanding of religious cultures in Africa, Central Asia, and the Middle East". The Library plans to leverage the donation in these areas: * Produce a book and a film about Omar ibn Said * Provide public access to "programs that enhance knowledge about faiths practiced in the regions, including Indigenous African religious traditions, Judaism, Christianity, Islam, and their influence on daily life." On May 8, 2025, two days after Hayden had given testimony to the

Senate Committee on Appropriations The United States Senate Committee on Appropriations is a standing committee of the United States Senate. It has jurisdiction over all discretionary spending legislation in the Senate. The Senate Appropriations Committee is the largest committe ...

and the Committee on House Administration, via email and without any explanation, she was abruptly fired by

President Trump Donald John Trump (born June 14, 1946) is an American politician, media personality, and businessman who is the 47th president of the United States. A member of the Republican Party, he served as the 45th president from 2017 to 2021. ...

. '' Publishers' Weekly'' characterized Hayden's termination as the "latest blow to professional research and the literary and arts community." No replacement of Hayden has been nominated. Principal Deputy Librarian Robert Newlen, who would have served as interim librarian was fired and Trump named Deputy Attorney General

Todd Blanche Todd Wallace Blanche (/blæntʃ/ BLANCH) (born August 6, 1974) is an American lawyer and former prosecutor who serves as the 40th United States Deputy Attorney General, United States deputy attorney general since 2025. Blanche is best known for ...

as acting librarian of Congress and later fired the deputy librarian and copyright office director (Perlmutter and Newlen), appointing senior DOJ officials Brian Nieves and Paul Perkins as respectively, for the interim. This has been interpreted as an attack on the separation of powers. Perlmutter has sued to dispute the legality of the dismissal, as the Register is appointed by, and responsible to, the

Holdings

The collections of the Library of Congress include more than 32 million catalogued books and other print materials in 470 languages; more than 61 million manuscripts; the largest rare book collection in North America, including the rough draft of the

, a

(originating from the

Saint Blaise Abbey, Black Forest Saint Blaise Abbey () was a Benedictine monastery in the village of St. Blasien in the Black Forest in Baden-Württemberg, Germany. History 9th–12th centuries The early history of the abbey is obscure. Its predecessor in the 9th century is ...

—one of only three perfect

copies known to exist); over 1 million U.S. government publications; 1 million issues of world newspapers spanning the past three centuries; 33,000 bound newspaper volumes; 500,000

microfilm A microform is a scaled-down reproduction of a document, typically either photographic film or paper, made for the purposes of transmission, storage, reading, and printing. Microform images are commonly reduced to about 4% or of the original d ...

reels; U.S. and foreign comic books—over 12,000 titles in all, totaling more than 140,000 issues; 1.9 million moving images (as of 2020); 5.3 million maps; 6 million works of

sheet music Sheet music is a handwritten or printed form of musical notation that uses musical symbols to indicate the pitches, rhythms, or chords of a song or instrumental musical piece. Like its analogs – printed Book, books or Pamphlet, pamphlets ...

; 3 million

sound recording Sound recording and reproduction is the electrical, Mechanical system, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects. The two main classes of ...

s; more than 14.7 million prints and photographic images including fine and popular art pieces and architectural drawings; the

Betts Stradivarius The ''Betts Stradivarius'' is a violin made in 1704 by the Italian luthier Antonio Stradivari of Cremona. It is one of around 650 known extant Stradivari instruments. It has been owned by the French violin maker Jean-Baptiste Vuillaume and Lon ...

; and the Cassavetti Stradivarius. The library developed a system of book classification called

(LCC), which is used by most U.S. research and university libraries. The library serves as a legal repository for

copyright A copyright is a type of intellectual property that gives its owner the exclusive legal right to copy, distribute, adapt, display, and perform a creative work, usually for a limited time. The creative work may be in a literary, artistic, ...

protection and

, and as the base for the

. Regardless of whether they register their copyright, all publishers are required to submit two complete copies of their published works to the library—this requirement is known as ''mandatory deposit''. Nearly 15,000 new items published in the U.S. arrive every business day at the library. Contrary to popular belief, however, the library does not retain all of these works in its permanent collection, although it does add an average of 12,000 items per day. Rejected items are used in trades with other libraries around the world, distributed to federal agencies, or donated to schools, communities, and other organizations within the United States. As is true of many similar libraries, the Library of Congress retains copies of every publication in the English language that is deemed significant. The Library of Congress states that its collection fills about of bookshelves and holds more than 167 million items with over 39 million books and other print materials. A 2000 study by information scientists Peter Lyman and

Hal Varian Hal Ronald Varian (born March 18, 1947, in Wooster, Ohio) is chief economist at Google and holds the title of emeritus professor at the University of California, Berkeley where he was founding dean of the School of Information. Varian is an econ ...

suggested that the amount of uncompressed textual data represented by the 26 million books then in the collection was 10

terabyte The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable un ...

s. The library also administers the

National Library Service for the Blind and Physically Handicapped The National Library Service for the Blind and Print Disabled (NLS) is a free library program of braille and audio materials such as books and magazines circulated to eligible borrowers in the United States and American citizens living abroad by p ...

, an audio book and

library program provided to more than 766,000 Americans.

Digital

The library's first digitization project,

, was launched in 1990, and was initially planned to choose 160 million objects from its collection to make digitally available on

LaserDisc LaserDisc (LD) is a home video format and the first commercial optical disc storage medium. It was developed by Philips, Pioneer Corporation, Pioneer, and the movie studio MCA Inc., MCA. The format was initially marketed in the United State ...

s and

CDs CDS, CDs, Cds, etc. may refer to: Finance * Canadian Depository for Securities, Canadian post-trade financial services company * Certificate of deposit (CDs) * Counterfeit Deterrence System, developed by the Central Bank Counterfeit Deterrence ...

, which were distributed to schools and libraries. After realizing that this plan would be too expensive and inefficient, and with the rise of the Internet, the library decided to instead make digitized material available over the Internet. This project was made official in the National Digital Library Program (NDLP), created in October 1994. By 1999, the NDLP had succeeded in digitizing over 5 million objects and had a budget of $12 million. The library has kept the "American Memory" name for its public domain website, which today contains 15 million digital objects, comprising over 7

petabyte The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable un ...

s of data. American Memory is a source for

public domain The public domain (PD) consists of all the creative work to which no Exclusive exclusive intellectual property rights apply. Those rights may have expired, been forfeited, expressly Waiver, waived, or may be inapplicable. Because no one holds ...

image resources, as well as audio, video, and archived Web content. Nearly all of the lists of holdings, the ''catalogs'' of the library, can be consulted directly on its website. Librarians all over the world consult these catalogs, through the Web or through other media better suited to their needs, when they need to catalog for their collection a book published in the United States. They use the

Library of Congress Control Number The Library of Congress Control Number (LCCN) is a serially based system of numbering cataloged records in the Library of Congress, in the United States. It is not related to the contents of any book, and should not be confused with Library of ...

to make sure of the exact identity of the book. Digital images are also available at

Snapshots of the Past Snapshots of the Past is an archive and blog founded in May 2001 by Jim Lantos. The online archive contains Library of Congress images publicly available as museum-quality, fine art reproductions. The blog and social media Social media are inter ...

, which provides archival prints. The library has a budget of $6–8 million each year for digitization, meaning that not all works can be digitized. It makes determinations about what objects to prioritize based on what is especially important to Congress or potentially interesting for the public. The 15 million digitized items represent less than 10% of the library's total 160-million-item collection. The library has chosen not to participate in other digital library projects such as

Google Books Google Books (previously known as Google Book Search, Google Print, and by its code-name Project Ocean) is a service from Google that searches the full text of books and magazines that Google has scanned, converted to text using optical charac ...

and the

Digital Public Library of America The Digital Public Library of America (DPLA) is a US project aimed at providing public access to digital holdings in order to create a large-scale public digital library. It officially launched on April 18, 2013, after two-and-a-half years of dev ...

, although it has supported the

Internet Archive The Internet Archive is an American 501(c)(3) organization, non-profit organization founded in 1996 by Brewster Kahle that runs a digital library website, archive.org. It provides free access to collections of digitized media including web ...

project.

Congressional

In 1995, the Library of Congress established

THOMAS Thomas may refer to: People * List of people with given name Thomas * Thomas (name) * Thomas (surname) * Saint Thomas (disambiguation) * Thomas Aquinas (1225–1274) Italian Dominican friar, philosopher, and Doctor of the Church * Thomas the A ...

, an online archive of the proceedings of the

, which included the full text of proposed legislation, bill summaries, and statuses, ''

Congressional Record The ''Congressional Record'' is the official record of the proceedings and debates of the United States Congress, published by the United States Government Publishing Office and issued when Congress is in session. The Congressional Record Ind ...

'' text, and an index of the ''

''. In 2005 and again in 2010, the THOMAS system received major updates. A migration to a more modernized Web system,

, began in 2012, and the THOMAS system was retired in 2016. Congress.gov is a joint project of the Library of Congress, the House, the Senate, and the

Government Publishing Office The United States Government Publishing Office (USGPO or GPO), formerly the United States Government Printing Office, is an agency of the legislative branch of the United States federal government. The office produces and distributes informatio ...

Buildings

Thomas Jefferson Building Aerial by Carol M

The Library of Congress is physically housed in three buildings on

and a conservation center in rural

Virginia Virginia, officially the Commonwealth of Virginia, is a U.S. state, state in the Southeastern United States, Southeastern and Mid-Atlantic (United States), Mid-Atlantic regions of the United States between the East Coast of the United States ...

. The library's Capitol Hill buildings are all connected by underground passageways, so that a library user need pass through security only once in a single visit. The library also has off-site storage facilities in

Maryland Maryland ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic region of the United States. It borders the states of Virginia to its south, West Virginia to its west, Pennsylvania to its north, and Delaware to its east ...

for less commonly requested materials.

Thomas Jefferson Building

The

is located between Independence Avenue and East Capitol Street on First Street SE. Construction began in 1890 with granite supplied by New England Granite Works, owned by James G. Batterson. The building opened in 1897 as the main building of the library and is the oldest of the three buildings. Known originally as the Library of Congress Building or Main Building, it took its present name on June 13, 1980.

John Adams Building

The

is located between Independence Avenue and East Capitol Street on 2nd Street SE, the block adjacent to the Jefferson Building. The building was originally known as The Annex to the Main Building, which had run out of space. It opened its doors to the public on January 3, 1939. Initially, it also housed the U.S. Copyright Office which moved to the Madison building in the 1970s.

James Madison Memorial Building

The James Madison Memorial Building is located between First and Second Streets on Independence Avenue SE. The building was constructed from 1971 to 1976, and serves as the official memorial to

, a

and the fourth President of the United States The Madison Building is also home to the

and to the Mary Pickford Theater, the "motion picture and television reading room" of the Library of Congress. The theater hosts regular free screenings of classic and contemporary movies and television shows.

Packard Campus for Audio-Visual Conservation

Founded in 2007 and located in

Northern Virginia Northern Virginia, locally referred to as NOVA or NoVA, comprises several County (United States), counties and independent city (United States), independent cities in the Commonwealth (U.S. state), Commonwealth of Virginia in the United States. ...

, the

is the Library of Congress's newest building. It was constructed out of a former

Federal Reserve The Federal Reserve System (often shortened to the Federal Reserve, or simply the Fed) is the central banking system of the United States. It was created on December 23, 1913, with the enactment of the Federal Reserve Act, after a series of ...

storage center and

Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...

bunker. The campus is designed to act as a single site to store all of the library's movie, television, and sound collections. It is named in honor of David Woodley Packard, whose

oversaw the design and construction of the facility. The centerpiece of the complex is a reproduction

Art Deco Art Deco, short for the French (), is a style of visual arts, architecture, and product design that first Art Deco in Paris, appeared in Paris in the 1910s just before World War I and flourished in the United States and Europe during the 1920 ...

movie theater that presents free movie screenings to the public on a semi-weekly basis.

Copyright Act

The Library of Congress, through both the librarian of Congress and the register of copyrights, is responsible for authorizing exceptions to Section 1201 of Title 17 of the United States Code as part of the Digital Millennium Copyright Act. This process is done every three years, with the register receiving proposals from the public and acting as an advisor to the librarian, who issues a ruling on what is exempt. After three years have passed, the ruling is no longer valid and a new ruling on exemptions must be made.

Access

The library is open for academic research to anyone with a Reader Identification Card. One may not remove library items from the reading rooms or the library buildings. Most of the library's general collection of books and journals are in the closed stacks of the Jefferson and Adams Buildings; specialized collections of books and other materials are in closed stacks in all three main library buildings, or are stored off-site. Access to the closed stacks is not permitted under any circumstances, except to authorized library staff, and occasionally, to dignitaries. Only the reading room reference collections are on open shelves. Since 1902, American libraries have been able to request books and other items through

from the Library of Congress if these items are not readily available elsewhere. Through this system, the Library of Congress has served as a "library of last resort", according to

, the

from 1899 to 1939. The Library of Congress lends books to other libraries with the stipulation that they be used only inside the borrowing library. In 2017, the Library of Congress began development on a reader's card for children under the age of sixteen.

Standards

In addition to its library services, the Library of Congress is actively involved in various standard activities in areas related to bibliographical and search and retrieval standards. Areas of work include

MARC standards MARC (machine-readable cataloging) is a standard set of digital formats for the machine-readable description of items catalogued by libraries, such as books, DVDs, and digital resources. Computerized library catalogs and library management ...

Metadata Encoding and Transmission Standard The Metadata Encoding and Transmission Standard (METS) is a metadata standards, metadata standard for encoding descriptive, administrative, and structural metadata regarding objects within a digital library, expressed using the XML schema langu ...

(METS),

Metadata Object Description Schema The Metadata Object Description Schema (MODS) is an XML-based bibliographic description schema developed by the United States Library of Congress' Network Development and Standards Office. MODS was designed as a compromise between the complexit ...

(MODS), Z39.50 and

Search/Retrieve Web Service Search/Retrieve Web service (SRW) is a web service for search and retrieval. SRW provides a SOAP interface to queries, to augment the URL interface provided by its companion protocol Search/Retrieve via URL (SRU). Queries in SRU and SRW are expre ...

(SRW), and

Search/Retrieve via URL Search/Retrieve via URL (SRU) is a standard search protocol for Internet search queries, utilizing Contextual Query Language (CQL), a standard query syntax for representing queries. SRU, along with the related Search/Retrieve via Web (SRW) serv ...

(SRU). The

Law Library of Congress The Law Library of Congress is the law library of the United States Congress. The Law Library of Congress holds the single most comprehensive and authoritative collection of domestic, foreign, and international legal materials in the world. Es ...

"seeks to further legal scholarship by providing opportunities for scholars and practitioners to conduct significant legal research. Individuals are invited to apply for projects which would further the multi-faceted mission of the law library in serving the U.S. Congress, other governmental agencies, and the public."

Annual events

Fellows in American Letters of the Library of Congress The Fellows in American Letters of the Library of Congress are awarded by the Library of Congress. History In 1943, during his tenure as Librarian of Congress (1939–1944), poet Archibald MacLeish appointed poet Allen Tate as Consultant in Poetry ...

Gershwin Prize The Library of Congress Gershwin Prize for Popular Song is an award given to a composer or performer for their lifetime contributions to popular music. Created in 2007 by the United States Library of Congress, the prize is named after brothers ...

for Popular Song *

* Founder's Day Celebration * Mostly Lost Film Identification Workshop *

Notable personnel

Henriette Avram Henriette Davidson Avram (October 7, 1919 – April 22, 2006) was a computer programmer and systems analyst who developed the MARC format (Machine Readable Cataloging), the international data standard for bibliographic and holdings information ...

: Developed the MARC format (Machine Readable Cataloging), the international data standard for bibliographic and holdings information in libraries. * John Y. Cole: founder of the

Center for the Book The Library of Congress's Center for the Book was founded in 1977 by Daniel J. Boorstin, the Librarian of Congress, to promote literacy, libraries, and reading and an understanding of the history and heritage of American literature. The Cent ...

and first historian of the Library of Congress. * Cecil Hobbs: American scholar of Southeast Asian history, head of the Southern Asia Section of the Orientalia (now Asian) Division of the Library of Congress, and a major contributor to scholarship on Asia and the development of South East Asian coverage in American library collections. *

Julius C. Jefferson Jr. Julius C. Jefferson Jr. (born July 22, 1968) is an American librarian who was president of the American Library Association for the 2020-2021 term. In 2022 President Joe Biden appointed him to the National Museum and Library Services Board which ...

, head of the

, president of the

(2020–2021), president of the

Freedom to Read Foundation The Freedom to Read Foundation (FTRF) is an American non-profit anti-censorship organization, established in 1969 by the American Library Association. The organization has been active in First Amendment-based challenges to book removals from librar ...

(2013–2016).

Explanatory notes

References

Architecture

*Cole, John Y. and Henry Hope Reed. ''The Library of Congress: The Art and Architecture of the Thomas Jefferson Building'' (1998
excerpt and text search
*Small, Herbert, and Henry Hope Reed. ''The Library of Congress: Its Architecture and Decoration'' (1983)

External links

The Library of Congress website (loc.gov)Library of Congress channel
on YouTube
Search the Library of Congress catalogLibrary Of Congress Meeting Notices and Rule Changes
from The Federal Registe
RSS FeedLibrary of Congress photos
on

Flickr Flickr ( ) is an image hosting service, image and Online video platform, video hosting service, as well as an online community, founded in Canada and headquartered in the United States. It was created by Ludicorp in 2004 and was previously a co ...

* *
Library of Congress
at FamilySearch Research Wiki for genealogists *
Library of Congress documentary and resources
on

C-SPAN Cable-Satellite Public Affairs Network (C-SPAN ) is an American Cable television in the United States, cable and Satellite television in the United States, satellite television network, created in 1979 by the cable television industry as a Non ...

The Library of Congress National Library Service (NLS)Video: "Library of Congress in 1968 – Computer Automation"
on YouTube from Computer History Archive Project
Library of Congress Web Archives (Search by URL)
{{Authority control 1800 establishments in Washington, D.C. Agencies of the United States Congress Archives in the United States Buildings of the United States government in Washington, D.C. Capitol Hill Deposit libraries Genealogical libraries in the United States Government agencies established in 1800 History museums in Washington, D.C. Independence Avenue (Washington, D.C.) Legislative libraries Libraries established in 1800 Congress, Library of

Photo archives in the United States Research libraries in the United States World Digital Library partners

History

1800–1851: Origin and Jefferson's contribution

1851–1865: Weakening

1865–1897: Spofford's expansion

1897–1939: Post-reorganization

1939–1987: National versus legislative role

1987–2015 Billington leadership, digitization and programs

2016–2025 Hayden leadership

Holdings

Digital

Congressional

Buildings

Thomas Jefferson Building

John Adams Building

James Madison Memorial Building

Packard Campus for Audio-Visual Conservation

Copyright Act

Access

Standards

Annual events

Notable personnel

See also

Explanatory notes

References

Architecture

Further reading

External links