北京城是中国历史上最后两代王朝明和清的都城——京师顺天府的城防建筑的总称,由宫城、皇城、内城、外城组成,包括城墙、城门、瓮城、角楼、敌台、护城河等多道设施,曾经是中国存世最完整的古代城市防御体系,被美国著名建筑师E.N.Bacon称为是“地球表面上的人类最伟大的个体工程”。作为封建王朝的政治、文化、军事和经济中心,北京城在许多方面体现 Beijing City is the last two generations of Chinese history, the capital and capital of the Qing Dynasty - the capital of Shun Tianfu city defense buildings, by the Miyagi, imperial city, inner city, outer city composition, including the city walls, gates, Urn, turret, enemy units , Moat and other facilities. It was once the most complete ancient city defensive system in China and was described by the famous American architect ENBacon as “the greatest human individual on the surface of the earth.” As a political, cultural, military and economic center of the feudal dynasty, Beijing City embodies in many ways