Final answer:
Constantine moved the Roman capital to Constantinople to establish a new center of power, be closer to the eastern provinces, and escape the declining situation in Rome, leveraging the city's strategic location for trade and military advantage.
Step-by-step explanation:
Around 330 CE, Emperor Constantine moved the capital of the Roman Empire to Constantinople (the site of ancient Byzantium) for several strategic reasons. First, he wanted to establish a new center of power distinct from the old city of Rome. Additionally, the location of Constantinople was geographically advantageous, as it was much closer to the eastern territories of the empire, which were economically prosperous and strategically important.
This move also allowed the emperor to escape the declining city of Rome. The choice of site maximized benefits such as proximity to trade routes and the sites of many Roman military campaigns. Under Constantine's leadership, the empire experienced a period of stability and growth, and the new capital grew to become a focal point of wealth and power, not only within the empire but also in the broader context of late antiquity and the Middle Ages.