Nicholas Goudanus (also de Gouda) (c.1517-1565) was a Dutch Jesuit and papal diplomat.

Pietro Ostini (27 April 1775 - 11 July 1849) was an Italian papal diplomat and Cardinal.

Vincenzo Lauro (1523-1592) was an Italian papal diplomat, bishop of Mondovì, and Cardinal from 1583.

Bartholomew of Trent (ca 1200 - 1251) was a Dominican hagiographer and papal diplomat.

Giacomo Giustiniani (1769-1843) was an Italian papal diplomat and Cardinal.

Despite his distinguished career as a papal diplomat, the Cardinal enjoyed strolling the streets of his native Ivrea and playing bocce with his friends.

In 1971, he entered the Pontifical Ecclesiastical Academy, which trains papal diplomats.

He was a papal diplomat, elected titular archbishop of Nicaea in 1698.

Oddone di Monferrato (died before 23 January 1251) was an Italian papal diplomat and Cardinal.

Michele Bonelli (1541-1598), cardinal and papal diplomat.