Keyword: "#ImperialCitadel #ThangLong #VietnamHeritage #WorldHeritage #UNESCO #DaiViet #VietnamHistory #CulturalHeritage #Hanoi #NationalPride #HeritageConservation #DiscoverVietnam"

For more than eight centuries, the Imperial Citadel of Thang Long served as the capital of Dai Viet (Great Viet) - the former name of Vietnam.