Ludovico Trevisan - Cardinalate

Cardinalate

Immediately afterward, on July 1, 1440, Trevisan was elevated cardinal priest, title of S. Lorenzo, by Pope Eugene IV and a medal in his honor was designed by Cristoforo di Geremia to commemorate the victory. Upon his elevation, Bishop Fortunato di Pellicanis of Sarsina began administering his patriarchate. Later that year, he became Camerlengo, an office he held until his death.

When Eugene IV and Filippo Visconti turned against Sforza, Trevisan was the organizer of the campaign to recapture the March of Ancona (to which he was named legate on September 13, 1442) for the papacy. Under Pope Callixtus III, Trevisan played an important role in organizing the naval campaign against the Ottomans in December 1455, both responsible for the construction of the papal navy and appointed "apostolic legate, governor general, captain and general condottiere" in charge of it. Trevisan defeated the Turkish assault on Mytilene in August 1457, during which many Turkish vessels were captured, receiving praise from the pope. Trevisan attended the papal congress of war in Mantua in 1459 where chronicler Andrea Schivenoglia described him on arrival as "aged sixty, a small, swarthy, hairy man, with a very proud, dark air about him" ("homo pizolo, negro, peloxo, com aìero molte superbo e schuro").

Trevisan was the only cardinal in the papal conclave, 1464 that did not subscribe to the conclave capitulation, which among other things, bound the pope to continue the Crusading war against the Ottoman Turks.