The Co Loa ancient citadel is located in the suburbs of Hanoi , about 20 kilometres from the centre of the city.
Covering nearly 500ha, it is a place to worship King An Duong Vuongand Princess My Chau with the magic crossbow legend that has been woveninto the anti-foreign aggression history of the Vietnamese people.
The citadel and its remains are a significant cultural heritage of the Viet people.
Many archaeological sites have been discovered there, reflecting thecontinuous development of the nation in many periods, especially theDong Son culture of the Bronze Age./.