The Cathedral is one of the most impressive buildings in town. It's not just about the cathedral, but a unique complex of religious buildings - the Cathedral of the Assumption of Mary, the church of St. Quirinus, St. Margaret's Church. The present architecture of the cathedral originates from Romanesque architectural style of 11th and 12th century, the original early Christian three-aisled basilica was erected on the ruins of Roman baths dating from the 5th century.