1 dic 313 anni - Constantine the Great was the first Roman Emperor to declare himself a Christian. In 313,
he issued the Edict of Milan expressing tolerance for all religions.
He did not make Christianity the state religion, but he did provide crucial support. Constantine called the first of seven ecumenical councils. In the fourth-century,
Eastern and Western Christianity had already begun to diverge. Between 600 and 750,
the constant need to defend itself in war turned the Eastern Roman Empire into the independent pol