Irenaeus of Sirmium was an Illyrian bishop living in Pannonia during the reign of Diocletian. Serving the community in what is now Sremska Mitrovica, he is remembered for his steadfast refusal to perform pagan sacrifices. Despite intense pressure from his own family, including his wife and children, he remained committed to his faith. Following a period of severe torture and imprisonment, he was executed by beheading near the Sava river in 304 AD.
Martyrdom
After being handed over to the governor of Roman Pannonia, Irenaeus endured prolonged suffering. Before his death, he prayed for both his own salvation and the strength of his congregation. His final request was for God to open the heavens so that angels might receive his soul. Following his execution, his remains were cast into the river.
Veneration
Recognized as a hieromartyr, he is honored within the Catholic and Orthodox traditions. His feast day is observed annually on April 6. He is remembered as a model of endurance for his refusal to renounce his beliefs even when faced with the pleas of his loved ones.