Imperial Citadel of Thang Long: Visiting Hanoi's UNESCO Royal Citadel in Ba Đình

The Imperial Citadel of Thang Long is where Hanoi’s story as a capital begins. Behind its walls in Ba Đình you can walk through a gate used by kings, stand on the foundation of their main palace, look down into excavations that reach back more than a thousand years, and then step into a modest building where wartime leaders made decisions in the twentieth century.

Why the Imperial Citadel of Thang Long matters

In 1010, a year after founding the Lý dynasty, King Lý Công Uẩn issued an edict moving the capital from Hoa Lư to Đại La, and named the new city Thăng Long. A walled royal city was built quickly, in rings: an outer city for the population, an imperial citadel for the court and officials, and a forbidden city at the centre reserved for the royal family.

Later dynasties rebuilt and extended it, and wars damaged it repeatedly. When the capital moved south at the end of the eighteenth century, the Nguyễn kings took much of the old palace material to their new capital, keeping only a few buildings for royal visits. In 1805 the old walls were pulled down for a smaller, Vauban-style citadel; in 1831 the city was renamed Hà Nội. The French later demolished most of that citadel for offices and barracks, and from 1954 the area became the headquarters of Vietnam’s Ministry of Defence.

According to the site’s managers, the layers under your feet tell that whole story: remains of the earlier Đại La citadel at the bottom, then Lý and Trần palaces, then Lê-period buildings, and the nineteenth-century Hanoi citadel on top. Ceramics and coins from China, Japan and West Asia found here show how connected the city was. In July 2010 UNESCO inscribed the central sector on the World Heritage List.

What you will see

• Đoan Môn. The main southern gate, with five arched stone entrances, once led to the palace. Excavations behind it uncovered a Trần-period road paved partly with Lý-dynasty bricks.
• The Kính Thiên palace site. Only the old foundation of the palace survives, together with its carved stone dragons. It was the ceremonial heart of the citadel.
• Hậu Lâu. Also called the Princess Tower, this building stands behind the palace site.
• Bắc Môn. The northern gate is one of the surviving gates of the nineteenth-century citadel.
• The 18 Hoàng Diệu excavations. Here archaeologists have exposed architectural remains and objects from several dynasties, stacked on top of each other.
• House D67. In this building, the Politburo and the Central Military Commission took key decisions during the war against the United States, including those behind the 1968 Tết offensive and the 1975 campaign.
• The Hanoi Flag Tower. Built in 1812 under King Gia Long, it is listed by the site among the surviving relics of the old citadel.

Local tip Restoration work on the Kính Thiên palace began in late September 2026, after years of research and consultation with UNESCO and ICOMOS. Ask at the ticket desk which parts of the central area are open while it continues.

Visiting respectfully

This is a protected heritage site that includes open archaeological excavations. The site’s rules ask you to follow the signed route, dress neatly, keep off the grass, leave trees and plants alone and never write on walls. Drones are not allowed, and filming needs prior permission from the heritage centre. The main points are in the table above.

When to go

The citadel is open every day; check the hours in the table. The heritage centre says the site is large enough to fill a whole morning or afternoon, so start early if you also want to see the Ho Chi Minh Mausoleum or the Temple of Literature the same day. The centre also runs a night tour; check its official website for details.

Getting there

The visitor entrance is on Hoàng Diệu Street in Ba Đình, west of the Old Quarter, and cars and motorbikes park there. A taxi or ride-hailing car from Hoan Kiem Lake is the simplest option.

Combining it with nearby sights

The Ho Chi Minh Mausoleum and the One Pillar Pagoda on Ba Đình Square are a short ride away, and so is the Temple of Literature, so the four make a natural full day of Hanoi history.