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Longest ancient city wall

Longest ancient city wall
Who
Nanjing city wall
What
35.267 kilometre(s)
Where
China (Nanjing)
When
Ming Dynasty (1368 - 1644)

According to UNESCO, the ancient city wall of Nanjing in China's Jiangsu province was 35.267 km long when first constructed in the Ming Dynasty (1368–1644), of which 25.091 km remain today. It has an average height of around 12 m and contains 13 gates.

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