St Irenaeus is the most important theologian of the second century, laying the foundation for all future Christian thinkers. Irenaeus tells us that he had known

Written in the form of a letter, the Proof is a manual of theology designed to serve as a guide to salvation and a way to refute heretics. It was composed in Ly

A full, contextual study of Irenaeus of Lyons, the first great theologian of the Christian tradition. John Behr sets Irenaeus both within his own context of the