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The Great Wall of China
The construction of the Great Wall of China took more than 2300 years (https://www.chinahighlights.com/greatwall/fact/building-time.htm#:~:text=Over%202%2C300%20Years%20in%209%2B %20Dynasties&text=Like%20Rome%2C%20the%20Great%20Wall,and%20renovated%20by%209%2B%20dynasties.) (680 BC - 1681 AD). Different parts of the wall were built during different Chinese dynasties. Its width reaches 5-8 meters, and its height reaches 6-10 meters. The total length of the wall is 21 km.