The Imperial Citadel of Thăng Long is a historic site located in Hanoi, Vietnam. It served as the political center of various dynasties for over a thousand years, beginning in the 10th century. The citadel is recognized for its unique architecture and cultural significance, showcasing a blend of Vietnamese and Chinese influences. Designated as a UNESCO World Heritage Site in 2010, the citadel features several important structures, including the Bach Ma Temple and the Flag Tower. Archaeological excavations have revealed artifacts that highlight the site's rich history and its role in the development of Vietnamese civilization.