Why was the city of Constantinople such an important city of the Byzantine Empire? Question 1 options: The city was easy to defend from invaders because of the wall built around all sides of the city. The city was the crossroads of Asia and Europe and was the center of 4 major trade routes. Constantine moved the capital to this city from Rome to Byzantium and renamed the city in his honor, Constantinople. It was a big market for people around the area, and people as far as Britain would venture to the area.