Walls
Walls, ancient military defense facilities, military defense lines consisting of walls and other ancillary military installations. The meaning of the wall, according to its function in a broad and narrow sense of the points. ▪ Broadly divided walls are divided into two categories, one for the main body of the Great Wall and the other for urban (city) defensive buildings, which constitute a closed area by walls and ancillary facilities. ▪ A narrow city refers to a city-enclosed area consisting of walls and ancillary facilities. Enclosed area for the city, outside the closed area outside the city. Walls as a city, city and castle against foreign invasion of defensive architecture. Wall from the structure and function points, mainly by the wall, crenel, tower, turret, gates and other parts. The vast majority of the walls are also moat. From the building of the raw materials, divided into a variety of types of rammed earth walls, adobe walls, brick walls, stone walls and masonry masonry. On the right is the Dai Temple north wall, from the walls to see Mount Tai. ...