明清城墙是明朝初年在明太祖朱元璋的"高筑墙、广积粮、缓称王"的思想指导下建成的。城墙完全围绕"防御"战略体系建造,包括护城河、吊桥、闸楼、箭楼、正楼、角楼、敌楼、女儿墙、垛口等一系列军事设施,城墙的厚度大于高度,墙顶可以跑车、操练,非常坚固。该书详述了关于明清城墙的历史过往,特点及价值,可谓是洋洋大观,精彩纷呈。
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