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Beacon Towers of Great Wall
The Great Wall of China was the only man made object that can be seen from outerspace with the naked eye. The following is the info about Beacon Towers.Being the oldest and most effective original telegram, beacon towers are the most important component of the defensive project on the Great Wall.
They are built continually to pass military messages. In ancient times, if intruders approached, soldiers on the wall would create smoke in the daytime and light a fire at night to warn their troops.
Constructional Type: There are mainly three types of Great Wall beacon towers. The first type of beacon towers is built on the wall. This beacon tower is the fastest to pass military messages. If enemies came, soldiers would be maneuvered in shortest time and got ready to quickly fight. The second type is the one located inside the wall and connects the passes or garrisons. The third is built some distance away from the wall, to watch the enemies' movements.
Constructional Structure: The history of the beacon tower construction is earlier than the building of the Great Wall. Han Dynasty (206BC – 220AD) emphasized on the construction of beacon towers, in some sections, the successive beacon towers even replaced the wall to form the defense system.
Defense System: In peaceful days, the beacon tower of Great Wall was the place where soldiers kept watch and animal dung and fire wood were saved. Soldiers raised sheep and cattle to eat and took their dung to burn, sometimes wolf dung was also used, and this is the reason why the beacon tower smoke is called "Langyan" (Wolves' smoke). While when war was coming, soldiers would light the fire wood to tell the next watch tower that dangers approached, so every watch tower would then get the message one after another until every soldier was fully alarmed and ready to fight.
Great Wall Construction List:
Beacon Towers
Construction Material
Great Wall Fortifications
Great Wall Passes
Walls
Labor Force
Principle & Method
Terrain & Structure
