 A new cathedral was built on property which had once been the church of S. Quirinus, and was dedicated in 1583 in the name of the Virgin Mary and S. Lawrence.The Chapter of the Cathedral was composed of five dignities (the Archdeacon, the Provost, the Primicerius, the Archpriest, and the Dean) and eighteen Canons (one of whom was the Theologus, another the Penitentiary).Pope Alexander III in 1177 had ordered that the number of Canons should not exceed sixteen.