Den Dau Temple is associated with the legend of Holy Mother Lieu Hanh, also known as Princess Lieu Hanh – a deity originating from the Mother Goddess worship belief of the Vietnamese people, honoring the role of women and mothers. According to legend, the Holy Mother was Que Nuong, the daughter of the Jade Emperor, who descended to earth three times to help the people. During her third descent, she transformed into an innkeeper selling porridge at Quan Chao (near Den Dau Temple), teaching people how to cultivate mulberries, raise silkworms, and weave silk for a prosperous life. She also miraculously manifested to assist King Quang Trung in defeating the Qing army in the year of Ky Dau (1789), liberating Thang Long. Landmarks such as Quan Chao, Den Dau, and Dong Giao have entered folk poetry: "Quan Chao - Den Dau - Dong Giao are famous landmarks, close to the Vietnamese people for generations."

The history of Den Dau Temple is linked to many important events: In 1592, Lord Trinh Tung rested here while leading troops to attack Dong Kinh. In 1788, King Quang Trung gathered 100,000 troops in Tam Diep and established a temporary palace near the temple. In 1952, the 3rd Congress of the Yen Son Commune Party Cell took place here to fight against French colonialists. In addition to the Holy Mother, the temple also worships Saint Tran Hung Dao as well as various prince and princess deities. The temple architecture consists of three sanctuaries: the Third Sanctuary with red-lacquered and gold-gilded ironwood pillars, the Second Sanctuary worshipping the Assembly of Four Palaces, and the First Sanctuary featuring the statues of the Three Palaces Holy Mothers (Heavenly Mother, Mountain and Forest Mother, Water Mother). These elements create historical depth, turning Den Dau Temple into an important Mother Goddess worship site, closely connected with other temples such as Song Temple (Thanh Hoa) or Phu Day (Nam Dinh).

