Introduction to Ngoc Son Temple: Ngoc Son Temple is located on Ngoc Son Island in the north of Hoan Kiem Lake. Built in the late years of the Le Dynasty, it was originally named Ngoc Son Temple. When it was destroyed and rebuilt in the third year of Shaozhi of the Nguyen Dynasty (1843 AD), the temple was converted into a shrine to worship the three saints, Emperor Guan, King Chen Guojun of Xingdao and Emperor Wenchang.