Zhangye Drum Tower, also known as "Zhenyuan Tower" and "Jingyuan Tower", was first built in the second year of Zhengde in the Ming Dynasty (1507), destroyed by war in the fifth year of Shunzhi in the Qing Dynasty (1648), and rebuilt in the seventh year of Kangxi (1668). The Drum Tower is square in plan, consisting of two parts, the tower and the pavilion, with a total height of 28 meters. The tower is built with rammed earth and blue bricks, with a side length of 32 meters and a height of 10 meters. There are four arched doors, and brick plaques are embedded in the middle of the doors, with "Xu Kai" in the east, "Bin Cheng" in the west, "Ying Xun" in the south, and "Zhen Yuan" in the north. There are plaques hanging on the four sides under the eaves, with "Jiu Chong Zai Wang" in the east, "Wan Guo Cheng Bin" in the west, "Sheng Jiao Si Da" in the south, and "Hu Shan Yi Lan" in the north. A Tang Dynasty bronze bell is hung in the southeast corner of the Drum Tower. It is made with exquisite casting craftsmanship and weighs about 600 kilograms. The bell is decorated in three layers: flying apsaras on the upper layer, Suzaku and Xuanwu on the middle layer, and Azure Dragon and White Tiger on the lower layer.