The Great Wall of China

Began the process of construction of the Great Wall of China in 221 BC, where he built the Emperor Qin Shi Huang first part of the Great Wall of China, but most of them were destroyed with the passage of time. In 1449, the Ming Dynasty to build what we know today as the Great Wall of China to defend the borders of China, especially against the Mongolian tribes. The length of the Great Wall of China to more than 4,000 miles, was built over a period of 300 years. In 2009, believed that the length of Aljaddarimkn that up to 5,000 kilometers (about 3107 miles), Houma advancement of technology and GPS and infrared, scientists, archaeologists believed that the Great Wall of China is much larger than previously thought. According to BBC News, new standards have been developed on the Great Wall of China, a length of about 8850 km (5,500 miles). Archaeologists still searching for the remains of missing persons from the wall. Great Wall of China rises to about 7.6 meters, the same display at the base and there are observation towers each about one hundred and fifty meters along the fence. And these towers rises to about 12 meters, and was used in the past as centers of control. Since China opened its borders to tourism in the late 1980s, there has been more than a million people visiting the Great Wall of China each year. With time and tourism harm the Great Wall of China. Thirty percent of the Great Wall of China was severely damaged, and 50 percent has disappeared, according to the 2007 survey conducted by the China Great Wall Society. Satellite images show the Great Wall of China as the sons of winding roads and shows where brick and stone materials clearly with the presence of additional structures such as control towers in the wall. There is a common belief that he can see the Great Wall of China has Manalvdhae shuttle missions that can not be proved to Great Wall of China can be seen from orbit.

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