Maria Constanze Cäcilia Josepha Johanna Aloysia Mozart (
née
The birth name is the name of the person given upon their birth. The term may be applied to the surname, the given name or to the entire name. Where births are required to be officially registered, the entire name entered onto a births registe ...
Weber; 5 January 1762 – 6 March 1842) was a German
soprano
A soprano () is a type of classical singing voice and has the highest vocal range of all voice types. The soprano's vocal range (using scientific pitch notation) is from approximately middle C (C4) = 261 Hertz, Hz to A5 in Choir, choral ...
, later a businesswoman. She is best remembered as the spouse of the composer
Wolfgang Amadeus Mozart
Wolfgang Amadeus Mozart (27 January 1756 – 5 December 1791) was a prolific and influential composer of the Classical period (music), Classical period. Despite his short life, his rapid pace of composition and proficiency from an early age ...
, who from the evidence of his letters was deeply in love with her throughout their nine-year marriage. Following her husband's sudden death in 1791, Constanze Mozart escaped poverty and supported her family through concertizing and promotion of her husband's memory; she was responsible in part for the extensive posthumous publication of her husband's works. She is also regarded, less positively, as a source of mythology concerning her husband's life, deriving in part from the biography she jointly wrote with her second husband,
Georg Nikolaus von Nissen.
Early years
Constanze Weber was born in
Zell im Wiesental, a town near
Lörrach
Lörrach () is a city in southwest Germany, in the valley of the Wiese, close to the French and the Swiss borders. It is the district seat of the district of Lörrach in Baden-Württemberg. It is the home of a number of large employers, inclu ...
in
Baden-Württemberg
Baden-Württemberg ( ; ), commonly shortened to BW or BaWü, is a states of Germany, German state () in Southwest Germany, east of the Rhine, which forms the southern part of Germany's western border with France. With more than 11.07 million i ...
, in the southwest of Germany. Her mother was
Cäcilia Weber, née Stamm. Her father, Fridolin Weber, worked as a "
double bass
The double bass (), also known as the upright bass, the acoustic bass, the bull fiddle, or simply the bass, is the largest and lowest-pitched string instrument, chordophone in the modern orchestra, symphony orchestra (excluding rare additions ...
player,
prompter, and
music copyist".
Fridolin's half-brother was the father of composer
Carl Maria von Weber
Carl Maria Friedrich Ernst von Weber (5 June 1826) was a German composer, conductor, virtuoso pianist, guitarist, and Music criticism, critic in the early Romantic music, Romantic period. Best known for List of operas by Carl Maria von Weber, h ...
. Constanze had two elder sisters,
Josepha
Josepha is a given name that works as the feminine variant of the name Joseph.
People with the given name
* Josepha Abiertas (1894–1929), Filipino lawyer and feminist, first woman to obtain a degree from the Philippine Law School
* Josepha ...
and
Aloysia, and a younger one,
Sophie
Sophie is a feminine given name, another version of Sophia, from the Greek word for "wisdom".
People with the name Born in the Middle Ages
* Sophie, Countess of Bar (c. 1004 or 1018–1093), sovereign Countess of Bar and lady of Mousson
* Soph ...
. All four were trained as singers and Josepha and Aloysia both went on to distinguished musical careers, later on performing in the premieres of a number of Mozart's works.
During most of Constanze's upbringing, the family lived in her mother's hometown of
Mannheim
Mannheim (; Palatine German language, Palatine German: or ), officially the University City of Mannheim (), is the List of cities in Baden-Württemberg by population, second-largest city in Baden-Württemberg after Stuttgart, the States of Ger ...
, an important cultural, intellectual and musical center. The 21-year-old Mozart visited Mannheim in 1777 on a job-hunting tour with his
mother
A mother is the female parent of a child. A woman may be considered a mother by virtue of having given birth, by raising a child who may or may not be her biological offspring, or by supplying her ovum for fertilisation in the case of ges ...
and developed a close relationship with the Weber family. He fell in love—not with 15-year-old Constanze, but with Aloysia.
While he was in
Paris
Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...
, Aloysia obtained a position as a singer in
Munich
Munich is the capital and most populous city of Bavaria, Germany. As of 30 November 2024, its population was 1,604,384, making it the third-largest city in Germany after Berlin and Hamburg. Munich is the largest city in Germany that is no ...
, and the family accompanied her there. She rejected Mozart when he passed through Munich on his way back to Salzburg.
The family moved to Vienna in 1779, again following Aloysia as she pursued her career. One month after their arrival, Fridolin died.
By the time Mozart moved to Vienna in 1781, Aloysia had married
Joseph Lange, who agreed to help Cäcilia Weber with an annual stipend; she also took in boarders to make ends meet. The house where the Webers lived (on the second floor) was at Am Peter 11, and bore a name (as houses often did at the time): ''Zum Auge Gottes'' ("God's Eye").
Marriage to Mozart
On first arriving in Vienna on 16 March 1781, Mozart stayed at the house of the
Teutonic Order
The Teutonic Order is a religious order (Catholic), Catholic religious institution founded as a military order (religious society), military society in Acre, Israel, Acre, Kingdom of Jerusalem. The Order of Brothers of the German House of Sa ...
with the staff of his patron,
Archbishop Colloredo. In May, he "was obliged to leave", and chose to board in the Weber household, originally intending "to stay there only a week".
After a while, it became apparent to Cäcilia Weber that Mozart was courting Constanze, now 19, and in the interest of propriety, she requested that he leave. Mozart moved out on 5 September to a third-floor room in the
Graben
In geology, a graben () is a depression (geology), depressed block of the Crust (geology), crust of a planet or moon, bordered by parallel normal faults.
Etymology
''Graben'' is a loan word from German language, German, meaning 'ditch' or 't ...
.
The courtship continued, not entirely smoothly. Surviving correspondence indicates that Mozart and Constanze briefly broke up in April 1782, over an episode involving jealousy (Constanze had permitted another young man to measure her calves in a parlor game). Mozart also faced a very difficult task getting permission for the marriage from his father,
Leopold.
The marriage finally took place in an atmosphere of crisis.
Daniel Heartz
Daniel Heartz (1928–2019) was an American musicologist and professor of music at the University of California, Berkeley.
Heartz studied at Harvard University. He lived in Berkeley, California
Berkeley ( ) is a city on the eastern shore of ...
suggests that eventually Constanze moved in with Mozart, which would have placed her in disgrace by the mores of the time. Mozart wrote to Leopold on 31 July 1782, "All the good and well-intentioned advice you have sent fails to address the case of a man who has already gone so far with a maiden. Further postponement is out of the question." Heartz relates, "Constanze's sister
Sophie
Sophie is a feminine given name, another version of Sophia, from the Greek word for "wisdom".
People with the name Born in the Middle Ages
* Sophie, Countess of Bar (c. 1004 or 1018–1093), sovereign Countess of Bar and lady of Mousson
* Soph ...
had tearfully declared that her mother would send the police after Constanze if she did not return home
resumably from Mozart's apartment" On 4 August, Mozart wrote to Baroness von Waldstätten, asking: "Can the police here enter anyone's house in this way? Perhaps it is only a ruse of Madame Weber to get her daughter back. If not, I know no better remedy than to marry Constanze tomorrow morning or if possible today."
The marriage did indeed take place that day, 4 August 1782, in a side chapel of
St. Stephen's Cathedral. In the marriage contract, Constanze "assigns to her bridegroom five hundred gulden which
..the latter has promised to augment with one thousand gulden", with the total "to pass to the survivor". Further, all joint acquisitions during the marriage were to remain the common property of both. A day after the marriage took place, the consent of Wolfgang's father arrived in the mail.
The couple had six children in eight years, but only two of them survived infancy:
#Raimund Leopold (17 June 1783 – 19 August 1783)
#
Karl Thomas Mozart (21 September 1784 – 31 October 1858)
#Johann Thomas Leopold (18 October 1786 – 15 November 1786)
#Theresia Constanzia Adelheid Friedericke Maria Anna (27 December 1787 – 29 June 1788)
#Anna Maria (16 November 1789 - 16 November 1789)
#
Franz Xaver Wolfgang Mozart (26 July 1791 – 29 July 1844)
The happiness of their marriage
During his trips to other cities, and during Constanze's trips to nearby
Baden
Baden (; ) is a historical territory in southern Germany. In earlier times it was considered to be on both sides of the Upper Rhine, but since the Napoleonic Wars, it has been considered only East of the Rhine.
History
The margraves of Ba ...
for medical treatment, the couple exchanged letters, of which a number of Mozart's survive. The letters are unfailingly affectionate, often intensely so; and at times they can also be solicitous, supervisory, erotic, or silly; the general sense they give is of a happy marriage.
A letter written from
Dresden
Dresden (; ; Upper Saxon German, Upper Saxon: ''Dräsdn''; , ) is the capital city of the States of Germany, German state of Saxony and its second most populous city after Leipzig. It is the List of cities in Germany by population, 12th most p ...
on 16 April 1789 gives instances of both "supervisory" and "silly". Mozart gives Constanze a six-item list of requests, including don't be sad, take care of your health, "be assured of my love"; "don't go out walking by yourself -- but best of all
don't go out walking at all." He concludes "I kiss you and squeeze you 1095060437082 times; this will help you to practice your pronunciation."
A passage both silly and erotic was written on the same journey, from
Berlin
Berlin ( ; ) is the Capital of Germany, capital and largest city of Germany, by both area and List of cities in Germany by population, population. With 3.7 million inhabitants, it has the List of cities in the European Union by population withi ...
on 23 May 1789, as Mozart was anticipating his homeward journey.
On June 1st I'll sleep in Prague
Prague ( ; ) is the capital and List of cities and towns in the Czech Republic, largest city of the Czech Republic and the historical capital of Bohemia. Prague, located on the Vltava River, has a population of about 1.4 million, while its P ...
, and on the 4th -- the 4th? -- I'll be sleeping with my dear little wife;--Spruce up your sweet little nest because my little rascal here really deserves it, he has been very well behaved but now he's itching to possess your sweet word erased by some unknown hand ">word erased by some unknown hand Just imagine that little sneak, while I am writing he has secretly crept up on the table and now looks at me questioningly; but I, without much ado, give him a little slap--but now he is even more word erased by some unknown hand ">word erased by some unknown hand well, he is almost out of control, the scoundrel.
No letters from Constanze to Wolfgang appear to survive. However, in her old age she remembered her marriage to Mozart (as well as her later marriage to Nissen) as very happy; she wrote in a letter to a music teacher named Friedrich Schwaan (5 December 1829): "I have had two most excellent husbands by whom I was loved and honoured – even, I have to say, adored; they, too were both equally loved by me with the utmost tenderness, thus I was twice completely happy.”
After Mozart's death
Mozart died in 1791, leaving debts and placing Constanze in a difficult position. At this point Constanze's business skills came into fruition: she obtained a pension from the emperor, organized profitable memorial concerts, and embarked on a campaign to publish the works of her late husband. These efforts gradually made Constanze financially secure and ultimately wealthy. She sent Karl and Franz to Prague to be educated by
Franz Xaver Niemetschek, with whom she collaborated on the first full-length biography of Mozart.
Among Constanze's musical accomplishments in the years after Mozart's death was her promulgation of his late opera
La Clemenza di Tito, which had been prepared for performance in Prague in 1791. She mounted a benefit performance on 29 December 1794 at the
Kärntnertortheater in Vienna, with her sister Aloysia Weber taking the role of Sextus. Further performances followed, both in Vienna and other cities, in which Constanze herself sang, taking the role of Vitellia.
Toward the end of 1797, she met
Georg Nikolaus von Nissen, a Danish diplomat and writer who, initially, was her tenant. The two began living together in September 1798. In 1809 they traveled to Pressburg (today's
Bratislava
Bratislava (German: ''Pressburg'', Hungarian: ''Pozsony'') is the Capital city, capital and largest city of the Slovakia, Slovak Republic and the fourth largest of all List of cities and towns on the river Danube, cities on the river Danube. ...
), at the time in Hungary, in order to be married legally (Nissen was Protestant, Constanze a Catholic, a barrier to marriage at the time in Austria). From 1810 to 1820, they lived in Copenhagen, and subsequently travelled throughout Europe, especially Germany and Italy. They settled in Salzburg in 1824. Both worked on a biography of Mozart; Constanze eventually published it in 1828, two years after her second husband's death.
During Constanze's last years in Salzburg, she had the company of her two surviving sisters,
Aloysia and
Sophie
Sophie is a feminine given name, another version of Sophia, from the Greek word for "wisdom".
People with the name Born in the Middle Ages
* Sophie, Countess of Bar (c. 1004 or 1018–1093), sovereign Countess of Bar and lady of Mousson
* Soph ...
, also widows, who moved to Salzburg and lived out their lives there.
Influences on Mozart's music

Constanze was a trained musician and played a role in her husband's career. Two instances can be given.
The extraordinary writing for
soprano
A soprano () is a type of classical singing voice and has the highest vocal range of all voice types. The soprano's vocal range (using scientific pitch notation) is from approximately middle C (C4) = 261 Hertz, Hz to A5 in Choir, choral ...
solo in the
Great Mass in C minor (for example, in the "Christe eleison" section of the Kyrie movement, or the aria "Et incarnatus est") was intended for Constanze, who sang in the 1783 premiere of this work in Salzburg.
Maynard Solomon in his Mozart biography speculatively describes the work as a love offering.
During the period of the couple's courtship, Mozart began making visits to Baron
Gottfried van Swieten
Gottfried Freiherr van Swieten (29 October 1733 – 29 March 1803) was a Dutch-born Austrian diplomat, librarian, and government official who served the Holy Roman Empire during the 18th century. He was an enthusiastic amateur musician and is be ...
, who let him examine his extensive collection of manuscripts of work by
Bach
Johann Sebastian Bach (German: �joːhan zeˈbasti̯an baχ ( – 28 July 1750) was a German composer and musician of the late Baroque period. He is known for his prolific output across a variety of instruments and forms, including the or ...
and
Handel
George Frideric (or Frederick) Handel ( ; baptised , ; 23 February 1685 – 14 April 1759) was a German-British Baroque composer well-known for his operas, oratorios, anthems, concerti grossi, and organ concerti.
Born in Halle, Germany, H ...
. Mozart was excited by this material, and a number of compositions show its influence on his own works. An important impetus was Constanze, who apparently had fallen in love with Baroque
counterpoint
In music theory, counterpoint is the relationship of two or more simultaneous musical lines (also called voices) that are harmonically dependent on each other, yet independent in rhythm and melodic contour. The term originates from the Latin ...
. This is known from a letter Mozart wrote to his sister
Nannerl on 20 April 1782. The letter was accompanied by a manuscript copy of the composer's
Fantasy and Fugue, K. 394.
I composed the fugue
In classical music, a fugue (, from Latin ''fuga'', meaning "flight" or "escape""Fugue, ''n''." ''The Concise Oxford English Dictionary'', eleventh edition, revised, ed. Catherine Soanes and Angus Stevenson (Oxford and New York: Oxford Universit ...
first and wrote it down while I was thinking out the prelude. I only hope that you will be able to read it, for it is written so very small; and I hope further that you will like it. Another time I shall send you something better for the clavier. My dear Constanze is really the cause of this fugue's coming into the world. Baron van Swieten, to whom I go every Sunday, gave me all the works of Händel and Sebastian Bach to take home with me (after I had played them to him). When Constanze heard the fugues, she absolutely fell in love with them. Now she will listen to nothing but fugues, and particularly (in this kind of composition) the works of Händel and Bach. Well, as she has often heard me play fugues out of my head, she asked me if I had ever written any down, and when I said I had not, she scolded me roundly for not recording some of my compositions in this most artistically beautiful of all musical forms and never ceased to entreat me until I wrote down a fugue for her.
Treatment by biographers

According to the ''
Grove Dictionary of Music and Musicians'', Constanze has been treated harshly and unfairly by a number of her biographers: "Early 20th-century scholarship severely criticized her as unintelligent, unmusical and even unfaithful, and as a neglectful and unworthy wife to Mozart. Such assessments (still current) were based on no good evidence, were tainted with anti-feminism and were probably wrong on all counts."
Complaints about unfairness to Constanze also appear in modern Mozart biographies by
Braunbehrens (1990), Solomon (1995), and Halliwell (1998).
[The earlier critics accused of unfairness variously include ]Alfred Einstein
Alfred Einstein (December 30, 1880February 13, 1952) was a German-American musicologist and music editor. He was born in Munich, and fled Nazi Germany after Adolf Hitler, Hitler's ''Machtergreifung'', arriving in the United States by 1939. He is b ...
, Wolfgang Hildesheimer, and .
Alleged photograph
A photograph (
daguerrotype), first brought to scholarly attention in 1958, has been claimed to show Constanze (Mozart) Nissen at age 78. The photo was supposedly taken in
Altötting
Altötting (, , in contrast to "Neuötting, New Ötting"; , ) is a Town#Germany, town in Bavaria, capital of the Altötting (district), district Altötting of Germany. For 500 years it has been the scene of religious pilgrimages by Catholics in ...
, Bavaria in October 1840 outside the home of
composer
A composer is a person who writes music. The term is especially used to indicate composers of Western classical music, or those who are composers by occupation. Many composers are, or were, also skilled performers of music.
Etymology and def ...
Max Keller. Several Mozart scholars have rebutted this claim. First, the photograph could not have been taken outdoors, since the lenses required to produce such images were not invented by
Joseph Petzval
Joseph Petzval (6 January 1807 – 17 September 1891) was a mathematician, inventor, and physicist best known for his work in optics. He was born in the town of Szepesbéla in the Kingdom of Hungary (in German: Zipser Bela, now Spišská Belá in ...
until after Constanze had died in 1842.
Second, it is documented that Constanze was crippled from debilitating
arthritis
Arthritis is a general medical term used to describe a disorder that affects joints. Symptoms generally include joint pain and stiffness. Other symptoms may include redness, warmth, Joint effusion, swelling, and decreased range of motion of ...
in her final years of life. Her biographer Agnes Selby suggested "There is absolutely no way she could have traveled to visit Maximillian Keller during the period when the photograph was taken. Contrary to the statements made in the newspaper, Constanze had no contact with Keller since 1826."
Third, author and historian Sean Munger noted that Constanze would have been 78 years of age in 1840 and does not look that old in the picture.
Legacy
The Royal Conservatory of Brussels conserves several autograph documents from Constance Mozart, including letters to her son Franz Xaver Wolfgang Mozart, as well as a small illustrated ''Album de Souvenirs'', dated 1789 but covering the 1801–1823 period in which she collects memories, impressions and poems (ref. Jean-Lucien Hollenfeltz fund, B-Bc-FH-163).
See also
* Biographies of Mozart – for Constanze's possible role in launching a variety of biographical myths about her first husband
* Johann Traeg – Cliff Eisen's conjecture for how Constanze quickly addressed her financial situation after her husband's death through a quick sale of manuscripts to this local dealer
References
Notes
Sources
*
*
*
*
*
*
*Spaethling, Robert (2000) ''Mozart's Letters, Mozart's Life''. New York: Norton.
*
Further reading
* Braunbehrens, Volkmar (1986) ''Mozart in Vienna: 1781–1791'', Timothy Bell Trans, HarperPerennial.
*Carr, Francis (1983) ''Mozart & Constanze''. London: Murray. (1983)
* Davenport, Marcia (1932) ''Mozart'', The Chautauqua Press.
*
*Gärtner, Heinz (1991) ''Constanze Mozart: after the Requiem''. Portland: Amadeus Press (1991)
* Glover, Jane (2005) ''Mozart's Women''.
*
*
*Servatius, Viveca, ''Constanze Mozart. Eine Biographie.'' Böhlau Verlag 2018.
External links
Website about Constanze Mozart
Constanze Mozart genealogy
Rodovid
{{DEFAULTSORT:Mozart, Constanze
1762 births
1842 deaths
18th-century Austrian women opera singers
19th-century Austrian women opera singers
Austrian people of German descent
Constanze
People from Lörrach (district)
Austrian sopranos
Constanze
Austrian Roman Catholics
German Roman Catholics