Why did Constantine move capital of Ramon empire to the new capital city of constantinople in present day turkey?

Emperor Constantine the Great moved the capital of the Byzantine/Roman Empire from Rome to Constantinople around 330 AD. He felt that Rome was an unsatisfactory capital. Rome was too far from the frontiers. Constantinople provided easy trade and military access to the Mediterranean, Black Sea, Danube River, Dnieper River, and the land route to Turkestan and India.