Den Quan Thanh (Quinn Thanh Temple) : The three ancient Chinese characters which are still seen today on the top of the entrance to the temple mean Tran Vu Quan.

Literally, the temple is dedicated to Saint Tran Vu. Temples are places for worshipping saints while pagodas are dedicated to Buddha and faithful disciplines.
Saint Tran Vu was a legendary figure which was a combination between a legendary character in Vietnam's legend and a mystic character derived from China's legend. In Vietnam's legend, he was a saint who had earned the merits of assisting Thuc Phan (future King An Duong Vuong) in getting rid of ghost spirit during the construction of CoLoa Citadel.

An Duong Vuong Temple in CoLoa Citadel (Dong Anh district) is also named Thuong Temple. Inside it, there are An Duong Vuong's bronze statue (cast in 1897) and a big arbalest symbolizing the magic arbalest in the old days.

In China's legend, Saint Tran Vu was a saint who had made many contributions in safeguarding the northern border.
Quan Thanh Temple was built during the reign of King Ly Thai To (1010-1028). Special attention should be paid to the black bronze statue of Saint Tran Vu. Another object of no less significance is a smaller black bronze statue of Old Trong, a chief artisan of the bronze casting team who had made the giant statue of Saint Tran Vu and the great bell on top of the entrance.