Münster is a city in North Rhine-Westphalia, Germany. It is located in the northern part of the state and is considered to be the cultural centre of the Westphalia region. It is most well known as the location of the Anabaptist rebellion during the Protestant Reformation and as the site of the signing of the Treaty of Westphalia ending the Thirty Years' War in 1648. Its bishops held temporal power for many centuries. St. Paul's Cathedral, built in the 13th century in a mixture of late Romanesque and early Gothic styles. It has been completely restored after WWII damage. It includes an astronomical clock of 1540, adorned with hand-painted zodiac symbols, which traces the movement of the planets, and plays a Glockenspiel tune every noon.