The Great Wall, China

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Summary

In about 220 B.C., under Qin Shin Huang, sections of fortifications which had been built earlier were joined together to form a united defense system against invasions from the north. Construction ...

In about 220 B.C., under Qin Shin Huang, sections of fortifications which had been built earlier were joined together to form a united defense system against invasions from the north. Construction continued up to the Ming dynasty (1368-1644), when the Great Wall became the world's largest military structure. Its historic and strategic importance is matched only by its architectural value.

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