What happened to Antonio Vivaldi’s musical manuscripts after his death?

Following Antonio Vivaldi’s death in 1741, his extensive collection of musical manuscripts—primarily autograph scores of his own compositions—was bound into 27 large volumes.1

These volumes were initially acquired by the Venetian bibliophile Jacopo Soranzo and subsequently passed to Count Giacomo Durazzo, who was a patron of Christoph Willibald Gluck. After being rediscovered in the 1920s, these manuscripts were preserved and today form a significant part of the Foà and Giordano collections housed at the National Library in Turin.1