One of the seven wonders of the world is Great Wall Of China. The ancient wall is made up of cement, rocks, bricks, and powdered dirt. The main motto for making this wall was was to protect the north of the empire of china from enemies attack. This longest human structure was completed in 1878. It is about 21,196 kilometres (13,171 miles) long, 9.1 metres (30 feet) wide and 15 metres (50 feet) high. Earlier the wall was made by dirt but later it was changed with bricks. The great wall consists of 19 walls in total. The wall was built under the command of Qin Shai Hong, the emperor of imperial China in 226 to 200 BC.
Qin Shai Hong made his own dynasty known as Qin dynasty. Xiongnu tributes were his enemies so he ordered to build the walls so that it would get difficult for them to cross the wall and enter their dynasty. Soon other dynasties constructed the wall longer. Initially, under Qin Shai Hong built the wall with dust and dirt. Later, Ming Dynasty they replaced dust and dirt with cement and bricks. Builders used materials that were nearby. Some parts of the wall were made of mud, straw, and twigs. Thousands of workers died from giant falling stones, exhaustion, disease, animal attacks, and starvation. The workers who died during the construction of this huge wall were buried under the wall is a myth. Known as the “Square Wall,” this fortification was situated in the northern part of the kingdom’s capital province.After administrative reorganization was carried out by Shang Yang (died 338 BCE), the Qin state grew politically and militarily to become the strongest among the seven states, but it was frequently raided by the Donghu and Loufan, two nomadic peoples from the north. Therefore, the Qin erected a wall that started from Lintiao, went north along the Liupan Mountains, and ended at the Huang He (Yellow River).
It is located at Asia- Pacific region of China. Barracks, stables, and armories were built near the wall’s inner surface. Now it is the most attracting places of the world. Every year a lot of tourist visit the great wall.In 2014 a portion of the wall near the border of Liaoning and Hebei province was repaired with concrete. The work has been much criticized. Earlier it was reported that Gret Wall can be seen from space. But later when Neil Armstrong told that he was not capable to see the wall from moon. But, Gene Cernan told he was able to see the great wall from the lower orbit.
In October 2003, Chinese astronaut Yang Liwei stated that he had not been able to see the Great Wall of China. In response, the European Space Agency (ESA) issued a press release reporting that from an orbit between 160 and 320 km (100 and 200 mi), the Great Wall is visible to the naked eye. Today, the defensive system of the Great Wall is generally recognized as one of the most impressive architectural feats in history. The great wall of China is one of the wonder of the world. Its fascinating walls, length and the historic material used for preparing the walls and the longest walls of the world.
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