Ambrogio Traversari, also referred to as Ambrose of Camaldoli (1386 – 20 October 1439), was an Italian monk and theologian who was a prime supporter of the papal cause in the 15th century.

[1] At the age of 14 he entered the Camaldolese Order in the Monastery of St. Mary of the Angels in Florence, and soon acquired a reputation as a leading theologian and Hellenist.

[1] But in this council, and later, in that of Florence, Traversari, by his efforts and charity toward some indigent Greek bishops, greatly helped to bring about a union of the two Churches, the decree for which, 6 July 1439, he was called on to prepare a draft.

Thus while among his own colleagues he seemed merely a hypocritical and arrogant priest, in his relations with his brother humanists, such as Cosimo de' Medici, he appeared as the student of classical antiquities and especially of Greek theological authors".

He also translated many homilies of John Chrysostom; the writings of Dionysius Areopagita (1436);[3] Basil of Caesarea's treatise on virginity; thirty-nine discourses of Ephrem the Syrian, and many other works of the Fathers and writers of the Greek Church.