Babies would be dropped off through a secret opening barely large enough for them, first created in 1696.
She was taught the violin by the school music director Antonio Vivaldi.
An anonymous poet wrote that when she played, countless angels dared to hover near.
Anna Maria also played the cello, oboe, lute, mandolin, harpsichord, and viola d'amore.
Anna Maria composed music and performed publicly for more than 60 years, dying of a fever and cough in Venice on 10 August 1782.