Columbia subject headings:
Constantine XI Palaeologus, Emperor of the East, 1405-1453.
Emperors--Byzantine Empire--Biography.
Harvard subject headings:
Byzantine Empire--History--Constantine XI Dragases, 1448-1453.
Byzantine Empire--History--John VIII Palaeologus, 1425-1448.
Constantine XI Palaeologus, Emperor of the East, 1405-1453.
Emperors--Byzantine Empire--Biography
Princeton subject headings:
Byzantine Empire--History--Constantine XI Dragases, 1448-1453.
Byzantine Empire--History--John VIII Palaeologus, 1425-1448.
Constantine XI Palaeologus, Emperor of the East, 1405-1453.
Emperors--Byzantine Empire--Biography.