“高坚甲于天下”的南京明城墙是明太祖朱元璋定都南京的产物和象征。这座耗时20余年,长约30多公里,建成于公元1386年的城墙,虽历经600多年风雨沧桑,仍以其坚固古朴的历史风韵吸引着八方来客,是世界公认的保存最为完整、坚固的城墙之一。城砖是南京明城墙浩大工程中用量最大的建筑材料,据估算,共耗用数十亿块。城 “High armor in the world ” Nanjing Ming wall is the product and symbol of Ming Taizu Zhu Yuanzhang capital Nanjing. Although it took more than 600 years to experience the vicissitudes of life in more than 600 years, it still attracts visitors from all over the world with its solid ancient historical charm. It is recognized as the most complete and sturdy preservation in the world One of the city walls. City brick is a huge project in Nanjing Ming City wall the largest amount of building materials, it is estimated that a total consumption of billions of blocks. city