The Great Wall of China
The great china wall was constructed mainly to act as a protection against enemy attacks. It started around 770-476 BC and lasted until 1368-1644 during the Ming Dynasty. Three groups of people are known to have taken part in the construction of the wall; the criminals, the soldiers and the common people. Many people died in the process of the building because of poor working conditions, short deadlines and heavy work. The state of Chu started the construction of the first wall but was later joined by other states such as The Qi,Yan and Wei
The total had length of the wall and had been a mystery for long because it was built during different times by different dynasties but in 2012 the China State administration of cultural relics announced that the length of the wall is 13,170.69 miles (21,196.18 kilometers). This is more than twice the previous estimate. However, the length and size of the wall is quickly reducing due to natural erosion and human activity such as building and construction by taking parts of the wall or by taking bricks from the wall for private building.
The Construction of the Great Wall of China started in the spring and Autumn Period (770 – 476 BC), and lasted until the Ming Dynasty (1368-1644). It is estimated to be about 2,221 years old