St. Peter's Cathedral in Zurich is located in the centre of Zurich, the Swiss financial center. It is the oldest church in Zurich. The Church Tower, built in 1534, has the largest church clock dial in Europe. The dial diameter of the clock is 8.7 meters, the hour hand is 3 meters long and the minute hand is 4 meters long. This church tower is used to monitor fires. It is said that once a fire alarm occurs, a flag is stretched in the direction of the fire to tell people where to put out the fire. It is similar to the beacon tower in ancient China. Zurich Cathedral, Notre Dame Cathedral and St. Peter Cathedral are the three main churches in Zurich. St. Peter's Church is not far from Lake Zurich. It is opposite the Limat River from the end of Lake Zurich, which is separated from Notre Dame's Cathedral. It's very convenient to go to Zurich Cathedral by tram and other public transport.