Highlights: The Zurich Cathedral stands on the banks of the Limmat River, reflecting the Frauenkirche. Its unique twin towers have become a symbol of Zurich, blending Romanesque, Post-Gothic and Neo-Gothic architectural styles. The founder of the Zurich Cathedral is the famous Karl the Great. After the restoration in the 11th-13th centuries, you can see the seated statue of Karl the Great with a sword on the south tower, but this is a replica, and the real one is collected in the St. inside the hall. The underground chapel and the choir seats are the oldest existing parts of the church, dating back to the late 11th and early 12th centuries, and traces of frescoes on the decoration can still be seen today. During the Reformation movement in the 16th century, the religious reformer Huldrych Zwingli gave a speech here, calling on people to "work without forgetting prayer".