The old city hall is located in Rome Square. The three triangular roofs in the row have become the landmark buildings of Frankfurt. There was also an astronomical clock on the wall. We were just in time for the clock to announce. It was said that the loud and powerful bell could travel several kilometers away. There are also St. Paul's Church, the Statue of Peace, the Statue of Justice and so on. There are still many small vendors and street artists in the square to solicit business. We didn't know the situation at first and dared not communicate with them.