
In Son Tay Town, Ha Tay Province, about 40km from Hanoi City. Body of the wall was built of hard sandstone with one gate on each side.Sơn Tây Citadel was built by King Minh Mạng in 1822 to defend the western gateway to the city of Thăng Long (Hà Nội). Constructed mainly from laterite, the four-sided...
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