Constantine XI is crowned Byzantine Emperor at Mystras.

Constantine XI Dragases Palaiologos or Dragaš Palaeologus was the last reigning Byzantine emperor from 23 January 1449 until his death in battle at the fall of Constantinople on 29 May 1453. Constantine's death marked the definitive end of the Eastern Roman Empire, which traced its origin to Constantine the Great's foundation of Constantinople as the Roman Empire's new capital in 330.

The foundation of Constantinople in 330 AD marks the conventional start of the Eastern Roman Empire, which fell to the Ottoman Empire in 1453 AD. Only the emperors who were recognized as legitimate rulers and exercised sovereign authority are included, to the exclusion of junior co-emperors who never attained the status of sole or senior ruler, as well as of the various usurpers or rebels who claimed the imperial title.

Mystras or Mistras, also known in the Chronicle of the Morea as Myzethras or Myzithras (Μυζηθρᾶς), is a fortified town and a former municipality in Laconia, Peloponnese, Greece. Situated on Mount Taygetus, above ancient Sparta, and below a Frankish castle, it served as the capital of the Byzantine Despotate of the Morea in the 14th and 15th centuries, experiencing a period of prosperity and cultural flowering during the Palaeologan Renaissance, including the teachings of Gemistos Plethon. The city also attracted artists and architects of the highest quality.

January 6 is the sixth day of the year in the Gregorian calendar; 359 days remain until the end of the year.