Hieromartyr Anthimus, Bishop of Nicomedia, and those with him: Theophilus the Deacon, Dorotheus, Mardonius, Migdonius, Peter, Indis, Gorgonius, Xeno, Domna the Virgin and Euthimius

Anthimus was bishop of Nicomedia, the eastern capital of the Roman emperor, when the great persecution began around 303. According to his Life, a Christian tore down the imperial edict posted in the city and was the first to die. A fire in the palace was then blamed on Christians, and many were executed or drowned.

Anthimus hid in a nearby village and wrote letters to the prisoners; his deacon, caught with them, was put to death. When soldiers came to arrest the bishop, he fed them and then told them who he was; they offered to let him escape, but he refused to make them lie and went with them. He was beheaded on 3 September. Among those killed with him were Dorotheus, Mardonius, Migdonius, Peter, Indis and Gorgonius, and Domna, who buried the drowned.