Saint Irenaeus of Sirmium (died 304 AD) was an Illyrian bishop of Sirmium in Pannonia, which is now Sremska Mitrovica, Serbia. He was bishop during the reign of Diocletian. He refused to offer pagan sacrifices, even at the behest of his family. He was condemned by the governor of Pannonia, and then beheaded on 24 March 304. External links https://web.archive.org/web/20070205223359/http://www.catholic-forum.com/saints/sainti66.htm See pages 78ff in "Victories of the Martyrs" by St. Alphonsus de Liguori References Walsh, Michael, ed. Butler's Lives of the Saints. 3rd-century births 304 deaths Illyrian people 4th-century Christian martyrs 3rd-century bishops in Pannonia People from Sirmium 4th-century bishops in Pannonia