Antiochus of Sulcis was an early Christian physician and martyr who lived during the Roman Empire. Born in Mauretania Caesariensis, he is said to have converted numerous individuals in Galatia and Cappadocia to Christianity. Due to his religious activities, authorities during the reign of Hadrian exiled him to the island of Plumbaria, known today as Sardinia. While working in the local mines, he reportedly converted his jailer, Cyriacus, and was eventually executed for his faith.