Constantine XI, Emperor (Despotate of Morea (Byzantine Empire)) : All Data

Constantine XI was the last Byzantine Emperor who ruled from 1449 to 1453. During his reign, he faced the formidable Ottoman Empire, which led to the famous Siege of Constantinople in 1453. This war marked the end of the Byzantine Empire as the Ottomans, led by Mehmed the Conqueror, successfully captured Constantinople, thus bringing an end to the thousand-year-old Byzantine Empire.