 He is best remembered for having supplied the libretto for George Frideric Handel's early operatic success "Agrippina", although he also supplied libretti for "Elmiro re di Corinto", by Carlo Pallavicino, and "Orazio" by G. F. Tosi.All the operas were produced at the Teatro S Giovanni Grisostomo, which he owned, while the remainder of his family owned several other Venetian opera houses.Politically he was allied to the Habsburg cause, and this alliance and his importance diplomatically to the Habsburgs led to him being made a cardinal in 1697.