No emperor converted the Roman Empire to Christianity. Constantine the Great favoured the Christians and towards the end of his life he got batpised. However, in his days Christianity was still very much a minority religion and he did not do anything to try to convert the pagans. All but one of the subsequent emperors were Christians. They introduced laws which put restrictions on pagan religious practices The emperors Gratian and Theodosius made mainstream Christianity the sole legitimate religion of the empire. Theodosius further tightened the anti-pagan laws , and sponsored or condoned the destruction of pagan temples and shrines Under his reign there were persecutions of pagans. However, no emperor actively tired to convert the pagans. It was the Christian clergy which made efforts to