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The Great Wall (UNESCO/TBS)

In c. 220 B.C., under Qin Shi Huang, sections of earlier fortifications were joined together to form a united defence 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 significance.Source: UNESCO TV / ? TBSProduced by TBSSupported by SonyURL:
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