The persecution which the Christians suffered under Valerian was more terrible than any other except that of Diocletian. Numerous calamities took place during his reign. The barbarians were constantly invading and ravaging the borders of the empire, and on the east the Persians did great damage. Still worse was the terrible plague which had begun in the reign of Decius and raged for about fifteen years. All these calamities aroused the religious fears of the emperor. Dionysius tells us that he was induced by Macrianus to have recourse to human sacrifices and other similar means of penetrating the events of the future, and when these rites failed, the presence of Christians—irreligious men hated by the gods—in the imperial family was urged as the reason for the failure, and thus the hostility of the emperor was aroused against all Christians. As a consequence an edict was published in 257 requiring all persons to conform at least outwardly to the religion of Rome on the penalty of exile. And at the same time the Christians were prohibited from holding religious services, upon pain of death. In 258 followed a rescript of terrible severity. Only the clergy and the higher ranks of the laity were attacked, but they were sentenced to death if they refused to repent, and the clergy, apparently, whether they repented or not. The persecution continued until Valerian’s captivity, which took place probably late in 260. The dates during this period are very uncertain, but Dionysius’ statement that the persecution continued forty-two months is probably not far out of the way; from late in the year 257 to the year 261, when it was brought to an end by Gallienus. In Egypt and the Orient the persecution seems to have continued a few months longer than elsewhere (see chap. 13, note 3). The martyrs were very numerous during the Valerian persecution, especially in Rome and Africa. The most noted were Cyprian and Xystus II. On the details of the persecution, see Tillemont, H. E. IV. p. 1 sq.