Born the (possibly illegitimate) son of Ivan Shishman of Bulgaria in 1360, and a Greek mother,[1] little is known of his early life before he became a monk on Mount Athos.

[1] Together with Byzantine Emperor John VIII Palaiologos, 23 Metropolitan bishops and about 700 scholars and theologians, he took part in the Council of Florence in 1431.

He is portrayed in Benozzo Gozzoli's frescoes in the Magi Chapel of Palazzo Medici Riccardi, which celebrates the entrance of the Byzantine dignitaries in the city.

His grave in the Dominican convent church of Santa Maria Novella in Florence survives, with an elaborate fresco portrait in a semi-Byzantine style.

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