Everything changed for the church in AD 313, when the Edict of Milan allowed complete freedom for Christian worship. The previous year the Emperor Constantine had decided to make Christianity the official religion of the Empire.
Some would say that Constantine was converted. However, it is unlikely that he was truly born again. He merely saw political advantage in making Christianity the ‘established’ faith. The changed situation soon became evident. In 315 Christian symbols began to appear on Roman coins, and by 323 the remaining pagan symbols finally disappeared.