to 1416 under Manuel II Palaiologos Hilario Doria, 1390s– 1423, under Manuel II Palaiologos Demetrios Chrysoloras, 1403–1408 in Thessalonica under Emperor John VII Palaiologos. John Phrangopoulos, 1428/9 in Morea under despot Theodore II Palaiologos George Doukas Philanthropenos, 1430–1439. Demetrios Palaiologos Kantakouzenos, 1434/5–1448 under Emperor John VIII Palaiologos (). George Doukas Philanthropenos and Manuel Iagaris Palaiologos, 1438–1439, while accompanying Emperor John VIII Palaiologos to Italy. Loukas Notaras, 1434–1453, last mesazōn of the Byzantine Empire under Emperors John VIII Palaiologos and Constantine XI Palaiologos (). References Sources Heads of government Byzantine administrative offices