The Ngọc Sơn Temple, Hoan Kiem Lake (Vietnam)

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The Ngọc Sơn Temple (Vietnamese: Đền Ngọc Sơn, chữ Nôm: 𪽛玉山) is located on a islet in Hoàn Kiếm Lake, central Hanoi, Vietnam.  The temple was built in early 19th century, originally dedicated to "Three Sages" Wenchang Dijun, Guan Yu and Lü Dongbin. At some point, the national hero, Trần Hưng Đạo, was incorporated into the temple. en.wikipedia