Demetrios Kydones
Demetrios Kydones (Latinized as Demetrius Cydones or Demetrius Cydonius; Greek: Δημήτριος Κυδώνης; 1324–1398), was a Byzantine Catholic theologian, translator, author and statesman. He served an unprecedented three terms as Mesazon (Imperial Prime Minister or Chancellor) of the Byzantine Empire under three successive emperors: John VI Kantakouzenos, John V Palaiologos and Manuel II Palaiologos.