Saint Irenaeus, Bishop of Lyons
June 28 – Saint Irenaeus, Bishop of Lyons – (Greek: Εἰρηναῖος), (2nd century AD – c. 202) –
Bishop of Lugdunum in Gaul, then a part of the Roman Empire (now Lyons, France). He was an early church father and apologist, and his writings were formative in the early development of Christian theology. He was a hearer of Polycarp, who in turn was a disciple of John the Evangelist.