Chrysolius was an Armenian priest who lived from approximately 250 to 303. Seeking refuge from the persecutions under Diocletian, he traveled to Rome, where Pope Marcellus I received him. He was later sent to northeast Gaul to spread the Christian faith. According to tradition, he studied under Saint Denis and worked alongside Saint Piatus to evangelize the regions of Tournai and Cambrai. He eventually served as a bishop before facing execution by Roman soldiers.