Giovanni da Firenze
Giovanni da Firenze was an Italian Dominican friar who worked as a missionary in the Caucasus. He was one of the companions of Bartolomeo il Piccolo, bishop of Maragheh and founder of the United Armenian Dominicans.
Pope John XXII erected the Latin diocese of Tiflis, today's Tbilisi, in 1329, and in 1330 appointed Giovanni its first bishop. He held the missionary see until his death; his successor was appointed only in 1349, and the residential diocese did not survive the fourteenth century.