He was an aged priest from Carthage in Africa, who fled to Rome with his deacon, Sisinius. He was arrested there and sentenced to hard labor in the building of huge baths for the pagans of Rome. In the midst of his hard work and toil, and despite his age, the light of his Faith was seen by all who met him. Many Roman pagans began to be converted by Saint Saturninus, attracted by the holiness of his looks and encouraged by what he taught and said. He and his deacon were beheaded by order of the pagan Emperor Diocletian.