His library, which contained a very extensive collection of Greek manuscripts, was presented by him in 1468 to the Senate of the Republic of Venice, and forms the nucleus of the famous library of St Mark's, the Biblioteca Marciana.
Bessarions bibliotek, som utgjordes av en mycket omfattande samling grekiska manuskript, överlämnade han 1468 till Venedigs senat, och den bildar stommen i det berömda Sankt Markusbiblioteket, Biblioteca Marciana.