Why did the designers of the Great Wall of China stuff their creation with a huge number of doors? (6 photos)

Even familiar and well-studied objects sometimes present unexpected surprises.





As, for example, happened to the majestic building - the Great Chinese wall. Employees of Tianjin University found in it has more than 130 doors, moreover, carefully disguised. The task of hidden openings was commonplace - to ensure the passage of merchants and pastoralists. In wartime, the doors were used by soldiers. However, you can imagine how elegant and mysterious it looked from the outside: the man disappeared, vanished into thin air. Or, conversely, suddenly materialized and attacked.



the great Wall of China

Scientists believe that this point has not been particularly studied before. And the discovery of secret doors will allow you to take a fresh look at the wonder of the world. Although anecdotal evidence has been discussed both in the scientific community, as well as among the inhabitants.





To discover hidden passages, the team filmed the wall with high resolution. Then all points potentially similar to passages put on the map, with which the expedition went on reconnaissance.



The doors were designed in such a cunning way that almost completely merged with the wall. Outside their impossible distinguish from the rest of the masonry. Separate passages are quite large, so that a small herd or herd can be led through them.

Professor of Tianjin University Zhang Yukun, who headed study group, emphasized that the system represented by a wall, was not closed, as previously thought, but open. Just I had to know the right places.



The designers also took into account the tactical importance of doors when they use during hostilities. Side turned to its own troops, was hollow, and the one that "looked" at the enemies was laid. If enemy forces approached the main entrance, the Chinese broke through thin masonry doors, went out and surrounded the enemy army, leaving no time to regroup.



Thus, the Great Wall of China, the length of which exceeds 21 thousand kilometers, presented the researchers with another surprise. And, apparently, not the last.