Saint Irenaeus (†202), was Bishop of Lugdunum, then a part of the Roman Empire (now Lyon, France) recognized as a saint in both the Catholic Church and the Eastern Orthodox Church. He was an early Church Father and apologist, and his writings were formative in the early development of Christian theology. A few within the Roman Catholic Church and Orthodox Church celebrate him as a martyr. He was buried under the Church of Saint John in Lyon, which was later renamed St Irenaeus in his honor but the tomb and his remains were utterly destroyed in 1562 by the Huguenots. His feast is celebrated on June 28 (Roman Catholic Church, Anglican Communion); and August 23 (Eastern Catholic, Orthodox and Oriental Churches).