Cologne Cathedral, located in the heart of Cologne, Germany, is the largest church in Germany. Its full name is Chaget Peter Maria Cathedral. It is known for its lightness and elegance. It is a medieval European Gothic architecture. The masterpiece can also be said to be the most perfect Gothic church building in the world. It is also known as the three major religious buildings in Europe with the Notre Dame Cathedral and the St. Peter's Basilica in Rome. Cathedral is a symbol of European Christian authority and a model of Gothic religious architecture. It is a rare five-entry building, the interior space is widened and widened, and the tall tower is straight to the sky, symbolizing the desire of people to communicate with God. In addition to the two towers, there are many small spires on the outside of the church. The walls of the church are decorated with stained glass depicting the characters of the Bible; the bell tower is equipped with five bells, the heaviest of which is 24 tons, the bells ringing and the sound is loud. There are many collections in Cologne Cathedral. During the Second World War, the church was partially destroyed and has been restored for nearly 20 years. The Cologne Cathedral, which is a symbol of faith and a testimony to European cultural traditions, was finally preserved.