Byzantine Empire
Solidus with the image of Justinian the Great The Empire at its greatest extent in 555 AD under Justinian the Great
Capital Constantinople Coordinates: 41°00′N 28°58′E / 41.000°N 28.967°E / 41.000; 28.967
Languages ▪ Latin ▪ Greek
Religion Roman paganism until 380. Christianity; Orthodox Christianity after 1054.
Government Autocratic absolute monarchy
Emperor - 330–337 Constantine I - 1449–1453 Constantine XI
Historical era Late Antiquity–Late Middle Ages - Partition of the Roman Empire 285 - Founding of Constantinople 330 - Death of Theodosius I 395 - Nominal end of Western Empire 476 - Fourth Crusade 1204 - Reconquest of Constantinople 1261 - Fall of Constantinople 29 May 1453 - Fall of Trebizond 15 August 1461
Population - 565 AD est. 26,000,000b - 780 AD est. 7,000,000 - 1025 AD est. 12,000,000 - 1143 AD est. 10,000,000 - 1282 AD est.