As a christian under the rule of emperors Diocleziano and Massimiliano, he was imprisoned and brutally tortured in an attempt to break his will and force him to renounce his faith. In the end (303AD) he was condemned to death and thrown into the sea in front of Trieste, tied to heavy weights. The ropes he was tied with came undone and the martyr's body was found on the beach and subsequently buried.
Carlo Wostry portrayed the martyr on an enormous canvas in 1900. The painting is now kept in the Cathedral of San Giusto.