What is the origin of the Great Wall of China?

The Great Wall of China is a construction military. A true fortification, the Great Wall was put in place to protect the northern border of China. Listed as a UNESCO World Heritage Site as Outstanding Universal Value, the Great Wall stretches between Shanhaiguan in the east and Jiayuguan in the west. It is made up of natural borders, such as mountains or rivers, as well as trenches and fortifications punctuated by towers for surveillance and shelters for protection.

the Great Wall of China, how long did it take to build?

The building of the Great Wall of China began around 220 BC. AD under the Qin dynasty. It continues under the Han, Yuan, Ming and Qing dynasties, ending at the end of the 17th century.^and century. On several occasions, the Great Wall of China was partially destroyed and then rebuilt. Even today, work is regularly carried out to preserve this building closely linked to the history of China.

Is the Great Wall of China really visible from space?

We often hear that The great wall of China is the only work carried out by the Man visible with theeye naked from space. Well, not really! It is actually a myth that dates from the 18th century.^and century, launched by the English antiquarian William Stukeley who wrote: “Hadrian’s Wall is exceeded only by the Chinese Wall, which draws a formidable figure on the terrestrial globe, and could well be visible from the Moon”. An idea then taken up again during the 19^and century.

In reality, although some 6,700 km long, it is no more than 6 m wide, which, at altitude, several tens or hundreds of kilometers from the ground, does not make it very identifiable. It can indeed be confused with watercourses. At an altitude of 15 km, it’s already difficult. The myth is tenacious, however, and the question continues to be asked of passengers on Space station.