Feast day: October 20
Saint Artemius was a soldier under Emperor Constantine the Great. He was appointed as the imperial prefect of Egypt by Emperor Constantius and used his influential position to spread the Arian heresy. During the reign of Julian the Apostate, Artemius hunted down and persecuted many religious, including monks, nuns, and bishops. He even persecuted Saint Athanasius. However, through prayer, Artemius converted to orthodox Christianity. He turned his persecution against pagans, including Julian. Saint Artemius was accused of destroying pagan idols and was arrested, tortured, and martyred.
(Image Manuel Panselinos, public domain, via Wikimedia Commons)