On 16 January 1500, Giovanni was elected
orator to the
Kingdom of Naples, although he did not set out until 29 October. He secured grain supplies from the kingdom, since Venice's imports from the Balkans had been interrupted by
its war with the Ottomans. As Louis XII
threatened Naples with invasion, he was ordered to withdraw. He was back in Venice by August 1501, when he was elected orator to the
Kingdom of Hungary. He left in November with the goal of bringing Hungary into the war against the Ottomans. Immediately upon his arrival in
Buda, he was ordered to go to
Poland to congratulate the new King
Alexander on his accession. He remained in Poland some months. From February 1503 to January 1504, he was the head of Venice's mission in Buda. On 8 January 1504, he was made a
knight by King
Vladislaus II. On 13 December 1504, Giovanni was named
podestà of
Chioggia. In October 1506, he became
avogadore di Comun. On 22 December, he was elected ambassador to the
Holy See. He arrived in Rome in March 1507. Early in 1508, on the eve of the
War of the League of Cambrai, he met with
Costantino Arianiti, who suggested that
Pope Julius II would break up the league if Venice handed over
Rimini and
Faenza. He was unable to prevent a papal declaration of war and left Rome on 18 June 1509. ==Post-blacklist diplomacy==