In what year did Constantine establish Constantiople and what is the city called today?

The city of Istanbulhas been settled for three thousand years, first by Thracians about the 12th Century BCE who called it Lygos. The Greeks colonised it in the 7th Century BCE, it was taken over by Rome in 196 CE, and called Byzantium until renamed in 330 CE by Constantine as Constantinople modestly after himself.as the new capital of the Roman Empire.