St. George's Church has always served as the main parish church. It is often referred to as "the cathedral" because of its size, but it has never been the seat of a diocese. Its construction started soon after 1200 and was completed at the beginning of the 15th century. Its design is pure Gothic, save for a Romanesque side portal. The choir, the last part to be completed, is the most remarkable element. It is illuminated by 288 stained glass panels, of which 55 date from the 15th century.