Situated in the center of Xi’an City, it is the most complete ancient city wall that has survived in China. The existing Xi’an City Wall was constructed from the seventh year of the 11th year of the Hongwu reign (1374-1378) of the Ming Dynasty. It is 13.74km in circumference and 12 m in height. There are four gates on the wall, and each gate consists of an arrow tower and a gate-tower. The city wall is surrounded by a moat.