year of inscription. 1987
criteria. Cultural
The origins of the Great Wall can be traced to 220BCE, when, under Qin Shi Huang, sections of earlier fortifications were linked to provide a unified defense system against invasions from the north. Construction continued from the 3rd century BCE to 17th century CE, in the Ming Dynasty. With a total length of some 20,000km, it runs from Jiayuguan in Gansu province eastwards to Shanhaiguan in Hebei province, across seven provinces of Gansu, Ningxia, Shaanxi, Shanxi, Hebei, and Liaoning, as well as the two municipalities of Beijing and Tianjin.
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