Constantinus I (Constantine the Great)

Constantine I, also known as Constantine the Great, was a Roman emperor who ruled from 306 to 337 AD. He is best known for uniting the Roman Empire and initiating its transition to Christianity. Constantine legalized Christianity with the Edict of Milan in 313, ending centuries of persecution. He also founded the city of Constantinople (modern-day Istanbul), which became a major center of power and culture. His reign significantly shaped Western history by promoting Christianity’s spread and strengthening the Roman Empire’s structure during a time of change.