Münster St. Johannes
St John's Cathedral was built between 1250 and 1274 by the Order of St John as a pillared basilica in early Gothic style. Before that, a chapel dedicated to St Kilian stood on the site. In 1554, the Teutonic Order acquired the entire property of the Knights of St John and carried out reconstruction work. The former flat ceiling of the nave of St. John's Church was replaced by a cross-ribbed vault; the vaults were decorated with the Renaissance painting that is still preserved today. The bell tower was built in several stages. The four lowest floors date from the time of construction. In 1445, the tower was raised by two floors. From 1594 to 1618, the characteristic tower gallery and the hood-shaped tower bulb were built over the octagon.