During the second century the Christian world was shaken by the Gnostics. Irenaeus came from Asia Minor via Rome to become bishop of Lyons, clarify Christian do

This work, which establishes Irenaeus as the most important of the theologians of the second century, is a detailed and effective refutation of Gnosticism, and

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