Which Emperor Converted to Christianity?

Emperor Constantine

(ca A.D. 280– 337) reigned over a major transition in the Roman Empire—and much more. His acceptance of Christianity and his establishment of an eastern capital city, which would later bear his name, mark his rule as a significant pivot point between ancient history and the Middle Ages.

Why did Constantine the Great converted to Christianity?

Some scholars allege that his main objective was to gain unanimous approval and submission to his authority from all classes, and therefore chose Christianity to conduct his political propaganda, believing that it was the most appropriate religion that could fit with the Imperial cult (see also Sol Invictus).

Which Roman emperor officially converted the empire's religion to Christianity?

On February 27, 380, in Thessaloniki, the Eastern Roman Emperor Theodosius I (347 - 395) signed a decree in the presence of the Western Roman Emperor Valentinian II (371 - 392) that made Christianity the religion of the state and punished the practice of pagan rituals.