He was born in Nicomedia; his father was a pagan, his mother a Christian. Through her he was taught the Christian Faith and baptized by St Hermolaus (July 26). He became a physician, and practiced his art with compassion and generosity, healing many more through his prayers as by his medicines. His parents had named him Pantoleon ("in all things a lion"), but because of his great compassion he was re-named Panteleimon ("all- merciful"). He once healed a man of blindness by calling on Christ, which led the once-blind man to embrace the Faith. When asked how he came to be healed he named Panteleimon as his healer and proclaimed his newfound faith in Christ. For this the pagans executed him, then arrested Panteleimon, who after many tortures was beheaded in 305. He is counted as the foremost of the Unmercenary Physicians.