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The constructed height varied from 5 to 8 meters (16 to 26 feet), depending on terrain and other factors. Its thickness ranges from about 4.5 to 9 meters (15 to 30 feet).

The Great Wall is one of the largest building construction projects ever completed. It stretches across the mountains of northern China, winding north and northwest of Beijing. It is constructed of masonry, rocks and packed-earth. At its greatest extent, it was over 5,000 km (=10,000 Li) long.

The Great Wall was built beginning around 241 BC and continued for several centuries. The wall was built mostly by making wood frames and packing them with dirt. In some places, notably near mountain quarries, the wall is made of stone.

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14y ago

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