Quan Thanh Temple (Vietnamese: Đền Quán Thánh), formerly known as Tran Vu Temple (Hán Việt: Trấn Vũ Quán, Hán tự: 真武觀), is a Taoist temple in Hanoi, Vietnam. Dated to the 11th century, the temple was dedicated to Xuan Wu, or Trấn Vũ in Vietnamese, one of the principal deities in Taoism. As one of the Four Sacred Temples of the capital, Quan Thanh Temple is located near West Lake in a ward of same name, Quan Thanh Ward, and is one of the leading tourist attractions in Hanoi.

(Source: http://en.wikipedia.org/wiki/Quan_Thanh_Temple)