Catholic Encyclopedia: St. Irenaeus: Article on the bishop of Lyons, Father of the Church, d. late second or early third century.
Catholic Online: St. Irenaeus: Short biography, estimates that the year of his death was 202.
Irenaeus: Article in the 1911 Encyclopædia Britannica on the early theologian's life and works. Includes bibliography.
Irenaeus of Lyons: Profile.
Irenaeus, Bishop of Lyons, Theologian: An essay on his teaching. With prayer in traditional and contemporary language.
Irenaeus, Saint: Brief entry in the Columbia Encyclopedia.
Saint Irenaeus, Doctor of the Church: From the book "Lives of Saints," published by John J. Crawley.
St. Irenaeus of Lyons: Summary of his life and writings, by Theresa A. Winters.
Vietnamese Eucharistic Youth Society: St. Irenaeus: The story of this early bishop of Lyons. Suitable for older children.