Constanze Mozart | |
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 Portrait by Joseph Lange c.1782 | |
| Born | Constantia Weber 5 January 1762 Zell im Wiesental, Landkreis Lörrach, Baden-Württemberg, Germany |
| Died | 6 March 1842 (aged 80) Salzburg, Austria |
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Maria Constanze Cäcilia Josepha Johanna Aloysia Mozart (née Weber; 5 January 1762 – 6 March 1842) was a trained Austrian singer. She was married twice, first to Wolfgang Amadeus Mozart; then to Georg Nikolaus von Nissen. She and Mozart had six children: Karl Thomas Mozart, Franz Xaver Wolfgang Mozart, and four others who died in infancy. She became Mozart's biographer jointly with her second husband.