Great Wall of China

The Great Wall of China is actually called the long wall. It is approximately 4,700 miles long. First built around 300 BC by six of seven warring states in this region to keep each from invading the other. The seventh state who did not build the wall was the strongest militarily and eventually won over the other six states and unified the region also unifying the wall. Initially, to build the wall, raw materials were lacking so they used stone and a combination of sticky rice, sand, dirt and gravel to hold them in place. Later, the wall was reinforced with marble. People in the area, however, stole the marble to build their homes. The wall deteriorated over the years. It has been rebuilt in places with concrete.Read more