The martyrdom of Cyprian, Bishop of Carthage, on September 14, 258, was one of the most notable of that period. Under Marcus Antoninus, the Christians were treated harshly, but the tyrant Commodus protected them by his leniency. After a temporary period of persecution during the reign of Severus, the Christians enjoyed a calm from 211 to 249. The storms gathered again under Decius, and so vigorous was the persecution that the bishops of the most considerable cities were removed by exile or death. _III.--The Church under Constantine_ From 284 to 303, during the reign of Diocletian, the Christian Church enjoyed peace and prosperity, but in the latter year Galerius persuaded the emperor to renew the persecution of the sect. An edict on February 24 enacted that all churches throughout the empire should be demolished, and the punishment of death was pronounced against all who should presume to hold any secret assemblies for the purposes of religious worship. Many suffered martyrdom under this cruel enactment. Churches everywhere were burnt, and sacred books destroyed. Three more edicts published before March 304 led to the imprisonment of all persons of the ecclesiastical order, compelled the magistrates to exercise torture to subvert the religion of their Christian prisoners, and made it the duty, as well as the interest, of the imperial officers to discover, to pursue, and to torment the most obnoxious among the faithful. But after six years of persecution, the mind of Galerius, softened by salutary reflection, induced him to attempt some reparation. In the edict of toleration which he published on April 30, 311, he expresses the hope "that our indulgence will engage the Christians to offer up their prayers to the Deity whom they adore for our safety and prosperity, and for that of the Republic." The triumph of the great Constantine established the security of the Christian Church from the attacks of the pagans. Converted in 306, Constantine, as soon as he had achieved the conquest of Italy, issued the Edict of Milan (313), declaring that the places of worship which had been confiscated should be restored to the Church without dispute, without delay, and without expense. Though himself never received by baptism into the Church, until his last moments, his powerful patronage of the Christians, and his edicts of toleration, removed all the temporal disadvantages which had hitherto retarded the progress of Christianity. The faith of Christ became the national religion of the empire. The soldiers bore upon their helmets and upon their shields the sacred emblem of the Cross. All the machinery of government was employed to propagate the faith, not only within the empire, but beyond its borders. Confirmed in his new religion by the miraculous vision of the Cross, Constantine, who was the master of the world, consented to recognise the superiority of the ecclesiastical orders in all spiritual matters, while retaining himself the temporal power.