Irenaeus

St. Irenaeus ( /aɪrəˈniːəs/; Greek: Εἰρηναῖος), (2nd century C.E. – c. 202) was 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.