Analysis of information sources in references of the Wikipedia article "List of longest-reigning monarchs" in English language version.
This temple was built between approximately 1135-1150 by Codaganga
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: CS1 maint: location missing publisher (link)王於是築城于越裳,廣千丈,盤旋如螺形,故號螺城。[The King then built a citadel at Việt Thường, one-thousand-zhàng wide, whirling and swirling like the shape of a snail. Therefore, it was called Old Snail City (Loa Thành).][better source needed]
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