Imperial Citadel of Thang Long is a term referring to the cultural complex comprising Thăng Long Imperial City during the Lý, Trần, Lê dynasties and Hanoi citadel during the Nguyễn Dynasty. The remains are roughly where the Hanoi Citadel stands today.
The royal palaces and most of the structures in Thang Long were destroyed in the late 19th century, and today the...