Notable Fathers of the Early Period.

St. Cyprian, Bishop of Carthage († 258).

St. Cyprian, commemorated on August 31, was Bishop of Carthage during the persecutions of the Emperor Decius (250). He died as a martyr in 258, and among his many writings concerning Church life, the most important is On the Unity of the Catholic Church, which sets forth the role of the Bishop in the ecclesiastical structure.

St. Ignatius, Bishop of Antioch († 107).

St. Ignatius was the second Bishop of Antioch and is commemorated on December 20 and January 29. Martyred in the Arena at Rome, while on his way to martyrdom, he wrote seven letters to Christian communities, as well as to St. Polycarp, which contain valuable information on the dogmas, organization and liturgy of the early Church.

St. Irenaeus of Lyons († 202).

St. Irenaeus, who is commemorated on August 23, was a disciple of St. Polycarp, and, as a Westerner, he succeeded St. Photinus as Bishop of Lyons. His major doctrinal work is Against Heresies, which defends Orthodoxy against the Gnostics, borrowing heavily on both human reason and Holy Scripture and Tradition, serving as an important witness to Church traditions of his time.

St. Polycarp, Bishop of Smyrna († 167).

St. Polycarp was a disciple of St. John the Theologian and is commemorated as a martyr on February 23. The account of his martyrdom, the earliest detailed account of a martyr, gives an excellent picture of his character and the steadfastness of his Christian faith.