Byzantine 13th, 14th, 15th C. AD

From Alexios IV Angelos Ἀλέξιος Δʹ Ἄγγελος 1203 – 1204 who was overthrown and imprisoned by the 4th Crusade of 1204 until Constantine XI Palaiologos Κωνσταντῖνος ΙΑʹ Παλαιολόγος 1449 – 1453 who was killed in the final Ottoman assault on Constantinople in 1453.