Frederick William I (; 14 August 1688 – 31 May 1740), known as the Soldier King (), was
King in Prussia
King ''in'' Prussia (German language, German: ''König in Preußen'') was a title used by the Prussian kings (also in personal union Elector of Brandenburg, Electors of Brandenburg) from 1701 to 1772. Subsequently, they used the title King ''of' ...
and
Elector of Brandenburg
This article lists the Margraves and Prince-elector, Electors of Margraviate of Brandenburg, Brandenburg during the time when Brandenburg was a constituent state of the Holy Roman Empire.
The Mark, or ''March'', of Brandenburg was one of the prima ...
from 1713 until his death in 1740, as well as
Prince of Neuchâtel.
Born in Berlin, he was raised by the
Huguenot
The Huguenots ( , ; ) are a Religious denomination, religious group of French people, French Protestants who held to the Reformed (Calvinist) tradition of Protestantism. The term, which may be derived from the name of a Swiss political leader, ...
governess
Marthe de Roucoulle. His political awakening occurred during the
Great Northern War
In the Great Northern War (1700–1721) a coalition led by the Tsardom of Russia successfully contested the supremacy of the Swedish Empire in Northern Europe, Northern, Central Europe, Central and Eastern Europe. The initial leaders of the ant ...
's plague outbreak in
Prussia
Prussia (; ; Old Prussian: ''Prūsija'') was a Germans, German state centred on the North European Plain that originated from the 1525 secularization of the Prussia (region), Prussian part of the State of the Teutonic Order. For centuries, ...
, leading to his challenge against
corruption
Corruption is a form of dishonesty or a criminal offense that is undertaken by a person or an organization that is entrusted in a position of authority to acquire illicit benefits or abuse power for one's gain. Corruption may involve activities ...
and inefficiency in government. He initiated reforms, especially in the military, doubling the
Prussian Army and increased the officer corps to 3,000. A believer in absolute monarchy, he focused on state development and financial reorganization, imposing taxes and stringent regulations on public servants. He made efforts to reduce
crime
In ordinary language, a crime is an unlawful act punishable by a State (polity), state or other authority. The term ''crime'' does not, in modern criminal law, have any simple and universally accepted definition,Farmer, Lindsay: "Crime, definiti ...
and centralized his authority during his 27 years' reign, cementing Prussia as a regional power.
Despite his effective rule, he had a harsh nature, exacerbated by his health issues. He engaged in colonial affairs, but prioritized military expansion over colonial investments. His notable decisions included selling
Prussian overseas colonies and the foundation of the
Canton system, as well as the conquest of the port of
Stettin
Szczecin ( , , ; ; ; or ) is the capital and largest city of the West Pomeranian Voivodeship in northwestern Poland. Located near the Baltic Sea and the German border, it is a major seaport, the largest city of northwestern Poland, and se ...
.
His death in 1740 marked the end of a reign characterized by military and administrative reform. He was succeeded by his son,
Frederick the Great
Frederick II (; 24 January 171217 August 1786) was the monarch of Prussia from 1740 until his death in 1786. He was the last Hohenzollern monarch titled ''King in Prussia'', declaring himself ''King of Prussia'' after annexing Royal Prussia ...
.
Early years
Frederick William was born in Berlin to King
Frederick I of Prussia
Frederick I (; 11 July 1657 – 25 February 1713), of the Hohenzollern dynasty, was (as Frederick III) List of margraves and electors of Brandenburg, Elector of Brandenburg (1688–1713) and Duke of Prussia in personal union (Brandenburg–Pr ...
and Princess
Sophia Charlotte of Hanover. During his first years, he was raised by the Huguenot governess
Marthe de Roucoulle. When the
Great Northern War plague outbreak devastated Prussia, the inefficiency and corruption of the king's favorite ministers and senior officials were highlighted. Frederick William with a party that formed at the court brought down the leading minister
Johann Kasimir Kolbe von Wartenberg
Johann Kasimir Kolbe, ''Graf'' von Wartenberg (6 February 1643, in Wetterau – 4 July 1712, in Frankfurt am Main) was the first ever Minister-President (effectively Prime Minister) of the kingdom of Prussia, and the head of the " Cabinet of T ...
and his cronies, following an official investigation that exposed Wartenberg's huge-scale misappropriation and embezzlement. His close associate
August David zu Sayn-Wittgenstein-Hohenstein was imprisoned at
Spandau Citadel
The Spandau Citadel () is a fortress in Berlin, Germany, one of the best-preserved Renaissance military structures of Europe. Built from 1559–94 atop a medieval fort on an island near the meeting of the Havel and the Spree, it was design ...
, fined 70,000 thalers and banished subsequently. The incident exerted great influence on Frederick William, making him resent crime, corruption, wastage and inefficiency and realize the necessity of institutional reform. It also became the first time he actively participated in politics. From then on, Frederick I began to let his son take more power.
Reign

His father had successfully acquired the title of king for the Duchy of Prussia for which he had paid the high price of 2 million ducats to Emperor
Leopold I, 600,000 ducats to the German clergy and 20,000 thalers to the
Jesuit order
The Society of Jesus (; abbreviation: S.J. or SJ), also known as the Jesuit Order or the Jesuits ( ; ), is a religious order of clerics regular of pontifical right for men in the Catholic Church headquartered in Rome. It was founded in 1540 by ...
. In addition, Frederick was obligated to provide Leopold with 8,000 soldiers for the
War of the Spanish Succession
The War of the Spanish Succession was a European great power conflict fought between 1701 and 1714. The immediate cause was the death of the childless Charles II of Spain in November 1700, which led to a struggle for control of the Spanish E ...
. To demonstrate his new status, he had the
Berlin Palace
The Berlin Palace (), formerly known as the Royal Palace (), is a large building adjacent to Berlin Cathedral and the Museum Island in the Mitte area of Berlin. It was the main residence of the Electors of Brandenburg, Kings of Prussia and Ge ...
,
Charlottenburg Palace
Schloss Charlottenburg (Charlottenburg Palace) is a Baroque palace in Berlin, located in Charlottenburg, a district of the Charlottenburg-Wilmersdorf borough, and is among the largest palaces in the world.
The palace was built at the end of th ...
, and
Königsberg Castle
Königsberg Castle (, ) was the seat of the grand masters of the Teutonic Order and of the dukes and kings of Prussia in the city of Königsberg (since 1946 Kaliningrad, Russia). The original fortress on the site was built by the Teutonic Knights ...
doubled in size and furnished at considerable expense. However, in doing so, he had largely ruined the state's finances.
On ascending the throne in 1713, Frederick William therefore dismissed his father's corrupt "
Cabinet of Three Counts". He worked persistently to reorganize the finances that had been shattered by his father, furthermore to enhance the economic development of his far-flung countries and to build up one of the largest and best equipped and trained armies in Europe. He would expand the Prussian Army from 38,000 men in 1713 to 80,000 in 1740, with an average of 1 out of every 25 Prussian men serving in the military. He expanded military obligations for the peasant class while replacing mandatory military service among the middle class with an annual tax, and he established schools and hospitals. The king encouraged farming, reclaimed marshes, stored grain in good times and sold it in bad times.
Frederick would also work to expand state income. He increased excise taxes, both on domestic and foreign goods, as well as subjecting the Prussian nobility to a land tax. He dictated the manual of Regulations for State Officials, containing 35 chapters and 297 paragraphs in which every public servant in Prussia could find his duties precisely set out: a minister or councillor failing to attend a committee meeting, for example, would lose six months' pay; if he absented himself a second time, he would be discharged from the royal service. In short, Frederick William I concerned himself with every aspect of his country, ruling an
absolute monarchy with great energy and skill.
The king also took an interest in
Prussian colonial affairs. In 1717, he revoked the charter of the
Brandenburg Africa Company (BAC), which had been granted said charter by his father to establish a colony in
West Africa
West Africa, also known as Western Africa, is the westernmost region of Africa. The United Nations geoscheme for Africa#Western Africa, United Nations defines Western Africa as the 16 countries of Benin, Burkina Faso, Cape Verde, The Gambia, Gha ...
known as the
Brandenburg Gold Coast. The king was unwilling to spend money on maintaining either the colony or the
Prussian Navy
The Prussian Navy (German language, German: ''Preußische Marine''), officially the Royal Prussian Navy (German Language, German: ''Königlich Preußische Marine''), was the naval force of the Kingdom of Prussia from 1701 to 1867.
The Prussian N ...
, preferring to utilise state revenues on enlarging the Royal
Prussian Army. In 1717, Frederick William sold the Brandenburg Gold Coast to the
Dutch West India Company
The Dutch West India Company () was a Dutch chartered company that was founded in 1621 and went defunct in 1792. Among its founders were Reynier Pauw, Willem Usselincx (1567–1647), and Jessé de Forest (1576–1624). On 3 June 1621, it was gra ...
.
In 1732, the king invited the
Salzburg Protestants
The Salzburg Protestants () were Protestantism, Protestant refugees who had lived in the Catholic Archbishopric of Salzburg until the 18th century. In a series of persecutions ending in 1731, over 20,000 Protestants were expelled from their homel ...
to settle in
East Prussia
East Prussia was a Provinces of Prussia, province of the Kingdom of Prussia from 1772 to 1829 and again from 1878 (with the Kingdom itself being part of the German Empire from 1871); following World War I it formed part of the Weimar Republic's ...
, which had been
depopulated by plague in 1709. Under the terms of the
Peace of Augsburg
The Peace of Augsburg (), also called the Augsburg Settlement, was a treaty between Charles V, Holy Roman Emperor, and the Schmalkaldic League, signed on 25 September 1555 in the German city of Augsburg. It officially ended the religious struggl ...
, the prince-archbishop of
Salzburg
Salzburg is the List of cities and towns in Austria, fourth-largest city in Austria. In 2020 its population was 156,852. The city lies on the Salzach, Salzach River, near the border with Germany and at the foot of the Austrian Alps, Alps moun ...
could require his subjects to practice the Catholic faith, but Protestants had the right to emigrate to a Protestant state. Prussian commissioners accompanied 20,000 Protestants to their new homes on the other side of Germany. Frederick William I personally welcomed the first group of migrants and sang Protestant hymns with them.
In 1733 he began building the
Dutch Quarter in
Potsdam
Potsdam () is the capital and largest city of the Germany, German States of Germany, state of Brandenburg. It is part of the Berlin/Brandenburg Metropolitan Region. Potsdam sits on the Havel, River Havel, a tributary of the Elbe, downstream of B ...
, where he invited talented Dutch craftsmen to settle.
Frederick William intervened briefly in the
Great Northern War
In the Great Northern War (1700–1721) a coalition led by the Tsardom of Russia successfully contested the supremacy of the Swedish Empire in Northern Europe, Northern, Central Europe, Central and Eastern Europe. The initial leaders of the ant ...
, allied with
Peter the Great
Peter I (, ;
– ), better known as Peter the Great, was the Sovereign, Tsar and Grand Prince of all Russia, Tsar of all Russia from 1682 and the first Emperor of Russia, Emperor of all Russia from 1721 until his death in 1725. He reigned j ...
of
Russia
Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...
, in order to gain a small portion of
Swedish Pomerania
Swedish Pomerania (; ) was a dominions of Sweden, dominion under the Sweden, Swedish Crown from 1630 to 1815 on what is now the Baltic Sea, Baltic coast of Germany and Poland. Following the Polish-Swedish War, Polish War and the Thirty Years' War ...
; this gave Prussia new ports on the
Baltic Sea
The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by the countries of Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden, and the North European Plain, North and Central European Plain regions. It is the ...
coast. More significantly, aided by his close friend
Leopold I, Prince of Anhalt-Dessau, the "Soldier-King" made considerable reforms to the Prussian army's training, tactics and conscription program—introducing the
canton system, and greatly increasing the Prussian infantry's rate of fire through the introduction of the iron ramrod. Frederick William's reforms left his son Frederick with the most formidable army in Europe, which Frederick used to increase Prussia's power.
Although a highly effective ruler, Frederick William had a perpetually short temper which sometimes drove him to physically attack servants (or even his own children) with a cane at the slightest perceived provocation. His violent, harsh nature was further exacerbated by his inherited
porphyritic disease, which gave him
gout
Gout ( ) is a form of inflammatory arthritis characterized by recurrent attacks of pain in a red, tender, hot, and Joint effusion, swollen joint, caused by the deposition of needle-like crystals of uric acid known as monosodium urate crysta ...
, obesity and frequent crippling stomach pains. He also had a notable
contempt for France, and would sometimes fly into a rage at the mere mention of that country, although this did not stop him from encouraging the immigration of French
Huguenot
The Huguenots ( , ; ) are a Religious denomination, religious group of French people, French Protestants who held to the Reformed (Calvinist) tradition of Protestantism. The term, which may be derived from the name of a Swiss political leader, ...
refugees to Prussia.
Burial and reburials
Frederick William died in 1740 at age 51 and was interred at the
Garrison Church in
Potsdam
Potsdam () is the capital and largest city of the Germany, German States of Germany, state of Brandenburg. It is part of the Berlin/Brandenburg Metropolitan Region. Potsdam sits on the Havel, River Havel, a tributary of the Elbe, downstream of B ...
. During World War II, in order to protect it from advancing allied forces,
Hitler
Adolf Hitler (20 April 1889 – 30 April 1945) was an Austrian-born German politician who was the dictator of Nazi Germany from 1933 until Death of Adolf Hitler, his suicide in 1945. Adolf Hitler's rise to power, He rose to power as the lea ...
ordered the king's coffin, as well as those of
Frederick the Great
Frederick II (; 24 January 171217 August 1786) was the monarch of Prussia from 1740 until his death in 1786. He was the last Hohenzollern monarch titled ''King in Prussia'', declaring himself ''King of Prussia'' after annexing Royal Prussia ...
and
Paul von Hindenburg
Paul Ludwig Hans Anton von Beneckendorff und von Hindenburg (2 October 1847 – 2 August 1934) was a German military and political leader who led the Imperial German Army during the First World War and later became President of Germany (1919� ...
, into hiding, first to Berlin and later to a salt mine outside of
Bernterode. The coffins were later discovered by occupying American forces, who re-interred the bodies in
St. Elizabeth's Church, Marburg in 1946. In 1953 the coffin was moved to
Hohenzollern Castle
Hohenzollern Castle ( ) is the ancestral seat of the imperial House of Hohenzollern. The third of three hilltop castle, hilltop castles built on the site, it is located atop Hohenzollern (mountain), Mount Hohenzollern, above and south of Hechin ...
, where it remained until 1991, when it was finally laid to rest on the steps of the altar in the Kaiser Friedrich Mausoleum in the
Church of Peace on the palace grounds of
Sanssouci
Sanssouci () is a historical building in Potsdam, near Berlin. Built by Prussian King Frederick the Great as his summer palace, it is often counted among the German rivals of Versailles. While Sanssouci is in the more intimate Rococo style and ...
. The original black marble sarcophagus collapsed at Burg Hohenzollern—the current one is a copper copy.
Relationship with Frederick II
His eldest surviving son was
Frederick II (Fritz), born in 1712. Frederick William wanted him to become a fine soldier. As a small child, Fritz was awakened each morning by the firing of a cannon. At the age of 6, he was given his own regiment of children to drill as cadets, and a year later, he was given a miniature arsenal.

The love and affection Frederick William had for his heir initially was soon soured due to their increasingly different personalities. Frederick William ordered Fritz to undergo a minimal education, live a simple Protestant lifestyle, and focus on the Army and statesmanship as he had. However, the intellectual Fritz was more interested in music, books and French culture, which were forbidden by his father as decadent and unmanly. As Fritz's defiance for his father's rules increased, Frederick William would frequently beat or humiliate Fritz (he preferred his younger sibling
Augustus William). Fritz was beaten for being thrown off a bolting horse and wearing gloves in cold weather.

At age 16, Frederick seems to have embarked upon a youthful affair with
Peter Karl Christoph von Keith, a 17-year-old
page
Page most commonly refers to:
* Page (paper), one side of a leaf of paper, as in a book
Page, PAGE, pages, or paging may also refer to:
Roles
* Page (assistance occupation), a professional occupation
* Page (servant), traditionally a young m ...
of his father. Rumors of the liaison spread in the court, and the "intimacy" between the two boys provoked the comments of his sister,
Wilhelmine
The Wilhelmine period or Wilhelmian era () comprises the period of German history between 1888 and 1918, embracing the reign of Kaiser Wilhelm II in the German Empire from the death of Kaiser Friedrich III until the end of World War I and Wilh ...
, who wrote, "Though I had noticed that he was on more familiar terms with this page than was proper in his position, I did not know how intimate the friendship was." Rumors finally reached King Frederick William, who cultivated an ideal of ultramasculinity in his court, and derided his son's supposedly
effeminate tendencies. As a result, Keith was dismissed from his service to the king and sent away to a regiment by the Dutch border, while Frederick was sent to the king's hunting lodge at
Königs Wusterhausen
Königs Wusterhausen (; , ) is a town in the Dahme-Spreewald district of the state of Brandenburg in Germany a few kilometers outside Berlin.
Geography
Geographical location
Königs Wusterhausen – locally known as "KW" () or "KWh" ()– lie ...
in order to "repent of his sin".
After the prince attempted to flee to England with his tutor,
Hans Hermann von Katte, the enraged king had Katte beheaded before the eyes of the prince, who himself was court-martialled. The king may have thought that Frederick's relationship with Katte was also romantic, a suspicion that may have played a role in Katte receiving a death sentence. In any case, the court declared itself not competent in the case of the crown prince. Whether it was the king's intention to have his son executed as well (as
Voltaire
François-Marie Arouet (; 21 November 169430 May 1778), known by his ''Pen name, nom de plume'' Voltaire (, ; ), was a French Age of Enlightenment, Enlightenment writer, philosopher (''philosophe''), satirist, and historian. Famous for his wit ...
claims) is not clear. However, the
Holy Roman Emperor
The Holy Roman Emperor, originally and officially the Emperor of the Romans (disambiguation), Emperor of the Romans (; ) during the Middle Ages, and also known as the Roman-German Emperor since the early modern period (; ), was the ruler and h ...
Charles VI intervened, claiming that a prince could only be tried by the
Imperial Diet of the
Holy Roman Empire
The Holy Roman Empire, also known as the Holy Roman Empire of the German Nation after 1512, was a polity in Central and Western Europe, usually headed by the Holy Roman Emperor. It developed in the Early Middle Ages, and lasted for a millennium ...
itself. Frederick was imprisoned in the Fortress of
Küstrin from 2 September to 19 November 1731 and exiled from court until February 1732, during which time he was rigorously schooled in matters of state. After achieving a measure of reconciliation, Frederick William had his son married to Princess
Elisabeth Christine of Brunswick-Wolfenbüttel-Bevern, whom Frederick despised, but then grudgingly allowed him to indulge in his musical and literary interests again. He also gifted him a stud farm in East Prussia, and
Rheinsberg Palace. By the time of Frederick William's death in 1740, he and Frederick were on at least reasonable terms with each other.
Although the relationship between Frederick William and Frederick was clearly hostile, Frederick wrote in his memoirs that his father "penetrated and understood great objectives and knew the best interests of his country better than any minister or general."
Marriage and family
Frederick William married his first cousin
Sophia Dorothea of Hanover,
George II's younger sister (daughter of his uncle, King
George I of Great Britain
George I (George Louis; ; 28 May 1660 – 11 June 1727) was King of Great Britain and King of Ireland, Ireland from 1 August 1714 and ruler of the Electorate of Hanover within the Holy Roman Empire from 23 January 1698 until his death in 1727. ...
and
Sophia Dorothea of Celle
Sophia Dorothea of Brunswick-Lüneburg-Celle (15 September 1666 – 13 November 1726) was the repudiated wife of future King George I of Great Britain. The union with George, her first cousin, was a marriage of state, arranged by her father Georg ...
) on 28 November 1706. Frederick William was faithful and loving to his wife
[Mitford, Nancy (1970). ''Frederick the Great'', New York: Harper & Row, Publishers, p. 16.] but they did not have a happy relationship: Sophia Dorothea feared his unpredictable temper and resented him, both for allowing her no influence or independence at court, and for refusing to marry her children to their English cousins. She also abhorred his cruelty towards their son and heir Frederick (with whom she was close), although rather than trying to mend the relationship between father and son she frequently spurred Frederick on in his defiance. They had fourteen children, including:
He was the godfather of the Prussian envoy
Friedrich Wilhelm von Thulemeyer and of his grand-nephew,
Prince Edward Augustus of Great Britain.
Ancestry
Memorial site and exhibition
Königs Wusterhausen
Königs Wusterhausen (; , ) is a town in the Dahme-Spreewald district of the state of Brandenburg in Germany a few kilometers outside Berlin.
Geography
Geographical location
Königs Wusterhausen – locally known as "KW" () or "KWh" ()– lie ...
Castle, the king's hunting lodge and garden, were his favourite place to stay and to indulge in hunting when he wanted to relax from his state duties, which he performed at the
Berlin Palace
The Berlin Palace (), formerly known as the Royal Palace (), is a large building adjacent to Berlin Cathedral and the Museum Island in the Mitte area of Berlin. It was the main residence of the Electors of Brandenburg, Kings of Prussia and Ge ...
and the
City Palace, Potsdam
The Potsdam City Palace () is a building in Potsdam, Germany, located on the Old Market Square, next to the St. Nicholas' Church (''Nikolaikirche''). It was the second official residence (the winter residence) of the margraves and electors of ...
. His children also had to spend their holidays here regularly. Frederick the Great had a strong dislike for the place, but the two youngest sons, in old age, after Frederick's death, returned together a few times out of sentimental memories to where they spent so much time growing up.
Today the castle, southeast of the Berlin city limits not far from Berlin Airport, is a museum of the
Prussian Palaces and Gardens Foundation Berlin-Brandenburg. Numerous valuable objects of baroque paintings and handicrafts are on display, mostly with connections to Frederick William and his family, many pieces of the original interior, as well as a large collection of portraits, mainly of officers, which the "Soldier King" painted himself.
See also
*
Prussian virtues
Prussian virtues ( German: ) are the virtues associated with the historical Kingdom of Prussia (1701–1918). They were derived from Prussia's militarism and the ethical code of the Prussian Army as well as from bourgeois values such as honesty a ...
References
Further reading
* Dorwart, Reinhold A. ''The administrative reforms of Frederick William I of Prussia'' (Harvard University Press, 2013).
* Fann, Willerd R. "Peacetime Attrition in the Army of Frederick William I, 1713–1740." ''Central European History'' 11.4 (1978): 323–334
online* Gothelf, Rodney. "Frederick William I and the beginnings of Prussian absolutism, 1713–1740." in ''The Rise of Prussia 1700–1830'' (Routledge, 2014) pp. 47–67.
*
External links
*
King Frederick William I of Prussia and his "obsession"
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