3. Birth of the Byzantine Empire
It was in 324 AD when Constantine I, the emperor of the West defeated the emperors of the East Maxentius and Licinius, in the civil wars of the Tetrarchy. Constantine also became the first Christian emperor of the Roman Empire and it is also true that during his reign Christianity became very dominant religion in the empire. During his time as the emperor his biggest regret was that he could never set up a unified church for Christians.
His accomplishments includes the formation of Constantinople city while many other Roman and Greek emperors also built their cities but Constantinople was the most magnificent of them all. It soon became the capital of the Byzantine Empire and the marked dawn of a new stretch.