Final answer:
Constantine broke from Roman tradition by decriminalizing Christianity with the Edict of Milan, moving the capital from Rome to Constantinople, and aligning the empire with Christian faith, which ended the persecution of Christians and decreased the focus on Roman polytheism.
Step-by-step explanation:
Emperor Constantine broke from Roman tradition in several significant ways. Firstly, he decriminalized Christianity with the Edict of Milan in 313, which promoted religious tolerance, allowing Christianity to flourish. Additionally, he moved the capital of the Roman Empire from Rome to Byzantium, which he renamed Constantinople. His support for Christianity led to increased church patronage, significantly changing the religious landscape of the empire. Constantinople's foundation as the new capital signaled a shift in power and influence away from Rome. Furthermore, Constantine influenced the later Roman Empire's culture and politics by shaping it around the Christian faith, thus ending the official persecution of Christians and neglecting the traditional Roman polytheism.