He participated at the Congress of Ferrara in 1526 as the Republic's representative; at the Congress the League of Cognac was formed against the Emperor, allying France with Venice and several states of Italy. Later, after the Sack of Rome (1527), he assisted in reconciling the emperor with Clement VII, whose release he had obtained, and with the Republic of Bologna. Upon his return to Venice, he was made a senator and a member of the Great Council.