Theopemptus was a bishop (some say in Nicomedia) who contested for Christ during the fierce persecutions of the Emperor Diocletian. For openly confessing the Faith, he was arrested and brought before the Emperor himself, whom he fearlessly convicted for his cruelty and ungodliness. The saint was then subjected to several cruel tortures, from which he miraculously emerged unhurt. He was given a deadly poison to drink, prepared by a sorcerer named Theonas. When Theonas saw that the holy bishop was unharmed by his potion, he was led to confess Christ. Finally, St Theopemptus was beheaded, and Theonas thrown in a pit and buried alive.