Saint Irenaeus (ca. 130-202) was bishop of Lugdunum in Gaul, which is now Lyons, France. He is recognized as a saint by both the Eastern Orthodox Church and the Catholic Church, and his writings were formative in the early development of Christian theology. His feast day is June 28. The Catholic Church considers him a Father of the Church. He was a disciple of Polycarp, who himself was a disciple of John the Evangelist. Irenaeus is thought to have been a Greek from Polycarp's hometown of Smyrna in Asia Minor, now Izmir, Turkey. He was brought up in a Christian family, rather than converting as an adult, and this may help explain his strong sense of orthodoxy. Irenaeus was one of the first Christian writers to use the principle of apostolic succession to refute his opponents. Irenaeus is remembered as the second bishop of Lyons, although there is no clear evidence that he ever officially assumed the episcopal duties. The first bishop, Pothinus, was martyred around 177 during persecutions under Marcus Aurelius, when Irenaeus was visiting Rome. Irenaeus is remembered as a martyr, although there is no evidence for how he died, though he presumably did so shortly after the turn of the third century. He was buried under the church of Saint John's in Lyons, which was later renamed St. Irenaeus. His tomb and his remains were destroyed in 1562 by the Calvinist Huguenots. The remains of Leonardo da Vinci and Kepler, among others, also were lost in the religious wars of those times. http://en.wikipedia.org/wiki/Irenaeus

A Siant in the early church who worked with the Apostal John and is considered the founder of Theolagy