Saturninus of Carthage was a North African bishop and martyr who lived during the early 4th century. Originally from Carthage, he was subjected to torture on a rack during the Decian persecution. Following this, he was sent into exile in Rome. While in the imperial city, he reportedly converted the tyrant Gratian to Christianity before facing execution. He died in 304, having been beheaded, an event recorded in inscriptions by Pope Damasus I.