Roman centurion at Tangiers (in modern Morocco). During a celebration of the emperor’s birthday, Marcellus refused to participate in the pagan offering ceremony. He threw away his arms and armour, openly declared himself a Christian, and was condemned to death. His condemnation led to the death of Saint Cassian.
- Book of Saints, by the Monks of Ramsgate
- Our Sunday Visitor’s Encyclopedia of Saints
- Pictorial Lives of the Saints