sentences:  During the papacy of Saint Sylvester, the Nicene Creed, which is recited by communicants of the vast majority of the world's Christian denominations, was formulated.Saint Sylvester is said to have healed, in the name of Christ, the emperor Constantine the Great of leprosy.After dying, Saint Sylvester was buried on 31 December in the Catacomb of Priscilla.