The city now known as Istanbul was founded as the Greek colony of Byzantium in the 8th century BCE. Eventually passing to Alexander the Great, it became a free city under the Romans in the 1st century CE. Emperor Constantine I made the city the seat of the Eastern Roman Empire in 330, later naming it Constantinople. It remained the capital of the subsequent Byzantine Empire after the fall of Rome in the late 5th century and then changed hands several times. Why was it renamed Istanbul in 1830? Discuss
Source: The Free Dictionary