Great Wall Of China

the Great Wall of China is an ancient Chinese fortification built and rebuilt between the sixteenth century to protect the northern borderof the Chinese empire during the successive imperial dynasties of the attacks of the nomadic Xiongnu of Mongolia.
it is estimated that theGreat Wall is about 21 kilometers long, from the Korean border at the Yalu River border to the Gobi Desert along an arc that roughlydelineates the southern edge of Inner Mongolia. The average is 6 to 7 meters high and 4 to 5 meters wide
The wall was named a World Heritage Siteby UNESCO. Much of the Great Wall is reputed to be the largest cemetery in the world. Approximately 10 million workers died duringconstruction. They were not buried in the wall itself, but sercas of the Great Wall of China. But it became something much bigger an architecturalgem of great majesty, was also announced that the Great Wall of China was selected as a winner in the list of New Seven Wonders of the ModernWorld
The forts were built along the walls, or directly built into the walls with a system of smoke signals may prevent an attack. Eachtower has unique access stairs so difficult to confuse the enemy. Barracks and administrative centers were located at greater distances. Alongthe walls are battlements on the top line of most of the wall, with defensive gaps a little over 30 cm in height and about 23 cm wide.