Byzantium (Greek: Βυζάντιον, Byzántion; Latin: BYZANTIVM) was an ancient Greek city, founded by Greek colonists from Megara in 667 BC and named after their king Byzas (Greek: Βύζας, Býzas, genitive Βύζαντος, Býzantos). The name Byzantium is a Latinization of the original name Byzantion. The city was later renamed Constantinople and briefly became the imperial residence of the classical Roman Empire, and then subsequently was, for more than a thousand years, the capital of the Byzantine Empire, the Greek-speaking Roman Empire of late Antiquity and the Middle Ages. Constantinople was captured by the Ottoman Turks, becoming the capital of their empire, in 1453. The name of the city was officially changed to Istanbul in 1930 following the establishment of modern Turkey.