There are many interesting legends was associated with the existence of Co Loa Citadel. Miracle stories related to the kingdom establishment of King An Duong Vuong, the citadel’s construction process; the magic crossbow as the gift from the golden turtle which can kill hundreds of invaders; the sorrowful but touching love affair between My Chau (King’s daughter) and Trong Thuy (son of King Trieu Da – enemy of King An Duong Vuong) and so forth.