Final answer:
Constantine chose Byzantium/Constantinople as his new capital due to its strategic location that allowed control over trade routes and easy defense. The city became a center of wealth, power, and culture in the Byzantine Empire.
Step-by-step explanation:
Constantine chose Byzantium, which he renamed Constantinople, as his new capital because of its strategic location at the crossroads of Asia and Europe. This location allowed Byzantium to control trade between the regions surrounding the Mediterranean and Black Seas and be a major terminus point of the Silk Road. Constantine built fortifications to protect the city, including sea walls on three sides and a strong wall on the fourth side.
Additionally, Constantinople's location on a peninsula with water on three sides made it easy to defend against land attacks. The city became a center of wealth and power in the Byzantine Empire, with a bustling market and important cultural and sporting events like chariot races in its hippodrome.
Overall, Constantine's choice of Byzantium/Constantinople as a capital offered significant advantages in controlling trade, defense, and cultural influence in the Eastern Roman Empire.