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

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