Constantine XI Palaiologos
Constantine XI Palaeiologos, or Palaeologos (Gr: Κωνσταντίνος ΙΑ' Δραγάσης Παλαιολόγος), was the last reigning Byzantine Emperor of the Palaiologos Dynasty, born 1404 AD in Mystras, and ruled from 1449 until his death in May 29, 1453, at the Fall of Constantinople. He is also referred to as Dragases.
Constantine was the son of Emperor Manuel II. He was trained as a soldier and in 1441 conquered the Morea Peninsula of Greece. It had long been under the Frankish principality of Achaia  Constantine was crowned Emperor january 6, 1449 AD succeeding his brother and a little less than five years in 1453 AD was killed during the final assaults by the Turkish Sultan, Mehmed II, advances on Constantinople.
- UNESCO World Heritage site of Mystras
- St. Ipomoni, Born as Helen Dragases before becoming a nun and assuming the name Ipomoni. She was the mother of Constantine XI Palaiologos. She lived a monastic life for over 25 years, after entering into the habit after the death of her husband. She died 1450AD and is commemorated by the church May 29. The relics of her skull and her icon are found at the Monastery of St. Patapios, Loutraki of Korinthos, Greece.
- Achaia: A state established by the Crusaders.
Constantine XI at Wikipedia.