WORLD HISTORY

Detailed explanation-1: -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.

Detailed explanation-2: -Theodosius was a strong adherent of the Christian doctrine of consubstantiality and an opponent of Arianism. He convened a council of bishops at Constantinople in 381, which confirmed the former as orthodoxy and the latter as a heresy.

Detailed explanation-3: -The Roman Empire circa 395 A.D. Early in his reign, Theodosius contracted an illness that almost carried him off. He subsequently underwent Christian baptism and declared himself a Christian of the Nicene Creed.

Detailed explanation-4: -Not too long after, in 380 CE, the emperor Theodosius signed the Edict of Thessalonica, making Nicene Christianity the official religion of the state, which confirmed and solidified the influence of Christianity not only on the Roman world at the time but also for the rest of world history.