Things to Do
Hanoi Flag Tower
One of the few structures in the old Hanoi Citadel to survive intact, the Flag Tower is a quick but genuinely worthwhile stop — and one of the city's most recognisable symbols.
A survivor of the citadel
Built between 1805 and 1812 under the Nguyen Dynasty as a military observation post for the old Hanoi Citadel, the Flag Tower is one of the very few citadel structures to survive both the French colonial period and the wars that followed largely intact — remarkable given how much of the surrounding citadel complex was demolished or destroyed over the following century and a half. It's remained in continuous military-related use for most of its history, which is a large part of why it's endured where so much else around it didn't.
The tower is built in three tapering stone tiers — the base roughly 42.5 metres wide, narrowing through a middle tier to a top tier around 12.8 metres wide — topped by a hexagonal pillar with a spiral staircase inside leading to the top. Look for the 36 small, flower-shaped windows set into the thick walls as you climb; they're both a distinctive design detail and, historically, functional observation and ventilation points.
The flag itself
The Vietnamese national flag has flown from the tower's summit every day since 1986, a genuinely meaningful symbol of national unity given the tower's long military history — the flag measures roughly 24 square metres and is replaced every two to three weeks due to weather wear. Seeing it up close from the top platform, rather than just as a distant landmark from elsewhere in the city, is part of what makes climbing to the top worthwhile rather than just viewing the tower from ground level.
What you'll see today
The tower rises in its three tapering stone platforms, with narrow internal staircases connecting the levels — worth the short climb for the view over the surrounding grounds and, from the upper platform's eight windows facing all directions, a genuinely good vantage point over this part of the city. Given its current place within the Imperial Citadel of Thang Long, a visit here pairs naturally with exploring the wider citadel site rather than the military museum displays it used to sit alongside.
Where it sits and how to combine it
The tower stands within the grounds of the Imperial Citadel of Thang Long, a short distance from the Ho Chi Minh Mausoleum complex — easy to combine into the same half-day if you're already covering Ba Dinh Square's sights, and a natural add-on to a citadel visit specifically since they now share the same site and, in most cases, the same ticket.
Why the tower matters beyond its age
The Flag Tower's significance goes beyond simply being an old building that happened to survive — it's genuinely one of the very few tangible links to the original Hanoi Citadel that predates French colonial rule, at a site (the wider Imperial Citadel of Thang Long) that carries over a thousand years of continuous political and military significance for the city. Where so much of pre-colonial Hanoi was demolished, redeveloped or lost across successive periods of French rule, war, and 20th-century urban growth, the Flag Tower stands as one of relatively few structures that connects directly back to the Nguyen Dynasty period without an intervening reconstruction. That rarity is part of why it holds genuine symbolic weight for Vietnamese visitors, beyond its straightforward appeal as a photogenic landmark for international tourists.
Frequently asked questions
Can I still visit the Vietnam Military History Museum nearby?
Yes, but check its current location before planning your route — the museum relocated to a new site as of 2024, so it's no longer immediately next to the Flag Tower the way older guides describe. Confirm the current address before assuming the two sit together.
Is it worth climbing to the top, or is the exterior enough?
The climb is short (a handful of minutes) and genuinely adds to the visit — the view from the top platform over the surrounding grounds, plus a close-up look at the flag itself, is worth the modest effort for most visitors. If time is very tight, the exterior alone still gives a good sense of the tower's scale and design.
Is there an entrance fee?
This depends on current arrangements for the Imperial Citadel of Thang Long site — check current ticketing before visiting, since access and pricing for this site have changed as the surrounding area has been reorganised.
What's the best time of day to visit for photos?
Morning generally offers softer light and fewer crowds than the afternoon, particularly if you're combining the visit with the busier Ho Chi Minh Mausoleum complex nearby, which draws heavier visitor numbers throughout the day. The tower's pale stone photographs well against a clear blue sky, so a fine-weather morning is the ideal combination if your schedule allows choosing.