According to the 1962 Missal of St. John XXIII the Extraordinary Form of the Roman Rite, today is the feast of St. Sylvester. He was the son of a lawyer and had also studied law before becoming a canon in his native town of Osimo. He was a zealous and fervent priest. His determination to retire into solitude was caused by the sight of the decomposing corpse of a friend. He at first lived as a hermit at Grotta Fucile, and then on Monte Fano where followers came to join him. He gave them the habit and Rule of St. Benedict together with certain other customs which reflect his own aspirations and the devotional tendencies of his day. He died in 1267 at the age of ninety.