330 establishments

Constantinople (see other names) was a historical city located on the Bosporus, which served as the capital of the Roman, Byzantine, Latin, and Ottoman empires between its consecration in 330 and the formal abolition of the Ottoman sultanate in 1922. Constantinople was founded in 324, initially as New Rome, during the reign of Constantine the Great on the site of the existing settlement of Byzantium and in 330 became the capital of the Roman Empire. Following the collapse of the Western Roman Empire in the late 5th century, Constantinople remained the capital of the Eastern Roman Empire (also

state established by proto-Mongols, from the late 4th century until the middle 6th century

Byzantine imperial palace complex

ancient building in Rome, Italy, built by the Roman emperor Constantine I between 326 and 330