Pope Cornelius (251-253) was the successor to Pope Fabian. During his reign a controversy arose concerning the manner of reinstating those who had fallen from the faith under the duress of persecution. The Novatians accused the Pope of too great indulgence and separated themselves from the Church. With the help of St. Lucina, Cornelius transferred the remains of the princes of the apostles to places of greater honor. On account of his successful preaching the pagans banished him to Centumcellae, where he died. St. Cyprian sent him a letter of condolence. At the time of Pope Cornelius there were at Rome forty-six priests, seven deacons, seven subdeacons, forty-two acolytes, fifty-two clerics and more than five hundred widows who were supported by the Church (according to Cornelius' letter to Bishop Fabian of Antioch).

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