The Old Quarter is a ranked national monument and the French Quarter is not. Hanoi's Ministry of Culture and Information ranked Khu pho co Ha Noi a national historic monument by Decision 14/2004/QD-BVHTT on 5 April 2004, naming nine wards of Hoan Kiem district (text of the decision, checked 11 September 2026). No equivalent decision exists for the quarter the French laid out south and east of Hoan Kiem Lake.

That absence is the thing worth understanding before you walk it. Protection in the French Quarter is not territorial, it is per building and per tier, which is why two villas on the same block can be under completely different rules and why the streetscape changes so unevenly from corner to corner.

This article stays with what Vietnamese authorities have actually published: the villa inventory and its tiers, the handful of French-period structures that carry national monument rank, the planning regulation over the district, and which of these buildings you can get inside. It does not cover the Old Quarter's guild streets, which are a different district built on a different logic.

How many are actually listed?

The number 1,216 is a count of villas, not of French buildings, and the distinction matters more than any other fact here. Decision 1845/QD-UBND, signed on 2 June 2022 by Duong Duc Tuan, Vice Chairman of the Hanoi People's Committee, promulgates the list of nha biet thu cu - old detached villas - built before 1954 across the city, and sorts every entry into one of three management groups (text of Decision 1845/QD-UBND, checked 11 September 2026).

Offices, schools, churches, hospitals, railway structures, apartment blocks and the Opera House are all French-period buildings, and none of them is a biet thu. They are not in this count. Anyone quoting 1,216 as the number of colonial buildings left in Hanoi is quoting a villa register as if it were an architectural survey.

The table below gives the tier structure as the decision sets it out, with what the accompanying 2013 regulation permits at each level.

Protection tier What it means for the building Count Source decision and date
Nhom 1 (Group 1) Position, architectural form, original appearance and planning parameters must all be kept 222 Decision 1845/QD-UBND, 2 June 2022
Nhom 2 (Group 2) Exterior architectural form and planning parameters must be kept; the interior is less constrained 356 Decision 1845/QD-UBND, 2 June 2022
Nhom 3 (Group 3) General construction law applies; a replacement must still be low-rise and follow approved planning 638 Decision 1845/QD-UBND, 2 June 2022
Total on the list All are barred from being demolished without authorisation 1,216 Decision 1845/QD-UBND, 2 June 2022

Two independent readings of the decision text return the same split, and the three group figures add exactly to the total. The decision also states which document it replaces: Decision 7177/QD-UBND of 28 November 2013, whose list carried 1,253 villas, so the 2022 register is 37 entries shorter than the one before it (Tien Phong, 3 June 2022, checked 11 September 2026).

The geography is concentrated. The Hanoi Institute of Urban Planning's summary of the decision gives Group 2 as Hoan Kiem 159, Ba Dinh 112, Hai Ba Trung 78, Tay Ho 4 and Dong Da 3; and Group 3 as Hoan Kiem 237, Ba Dinh 216, Hai Ba Trung 166, Dong Da 13 and Tay Ho 6 (Vien Quy hoach xay dung Ha Noi, 12 June 2022, checked 11 September 2026). For Group 1 the same summary names only Ba Dinh 111, Hoan Kiem 87 and Tay Ho 3, which leaves 21 of the 222 unattributed in that particular listing.

Ownership is the other axis, and it is not evenly spread either. Hanoi's Department of Construction reported that 367 of the 1,216 are state-owned - 177 in Group 1, 131 in Group 2 and 59 in Group 3 - with 207 of those classed as not for sale and under review for auction or long-term lease (VietnamPlus, 15 April 2022, checked 11 September 2026). The rest are private or in mixed ownership, which is where enforcement gets difficult.

What does each tier permit?

The tier rules live in a separate document from the list, and reading them explains why the quarter looks the way it does. Decision 52/2013/QD-UBND of 28 November 2013 issues the Quy che quan ly, su dung nha biet thu cu - the management and use regulation for pre-1954 villas - and its Article 5 sets a points system: 70 to 100 points for Group 1, 50 to 69 for Group 2, under 50 for Group 3 (text of Decision 52/2013/QD-UBND, checked 11 September 2026).

Group 1 is the tier with real teeth. Article 9 requires a Group 1 villa to keep its position, its architectural form, its original appearance and its planning parameters - density, number of storeys, height. Group 2 must keep the exterior architectural form and the planning parameters, which is the clause that produces the quarter's most common outcome: an original street facade with a rebuilt interior behind it.

Maintenance is graded the same way, under Article 8. Changing the colour or the materials of a Group 1 villa requires sign-off from the Department of Construction, the Department of Planning and Architecture and the city; for Group 2 the Department of Planning and Architecture alone; Group 3 follows ordinary construction maintenance rules. That is why repainting is a permit matter in this district and not a private decision.

Demolition sits in Article 10. Group 1 and Group 2 villas may only be pulled down where a structural assessment finds them dangerously damaged, and the replacement must reproduce the architectural form, appearance and planning parameters of the villa that stood there. Group 3 can be demolished if structurally unsafe, with a low-rise replacement to approved planning.

The district-wide layer is planning law rather than heritage law. Decision 24/2015/QD-UBND, signed on 13 August 2015 by then-chairman Nguyen The Thao and effective from 23 August 2015, issues the planning and architecture management regulation for Khu pho cu Ha Noi, the old French-built quarter (Cong Thong tin dien tu Chinh phu, checked 11 September 2026). It covers 507.88 hectares in 215 blocks, divided into zone A in Ba Dinh (about 144 ha), zone B in Hoan Kiem (about 200.81 ha), zone C in Hai Ba Trung (about 143.33 ha) and zone D in Tay Ho (about 19.74 ha), with a supplementary zone E of about 92.95 ha. Heights are generally capped at four to six storeys, or 16 to 22 metres, with selected large plots allowed eight storeys and 29 metres, and building density capped at 70 per cent (Vien Quy hoach xay dung Ha Noi, 23 September 2015, checked 11 September 2026).

Enforcement has been an acknowledged problem. In July 2022 Hanoi's Department of Construction instructed the six districts holding listed villas and the state enterprises managing them to prevent and act against organisations and individuals altering or demolishing old villas without authorisation, and assigned the construction inspectorate to monitor compliance (Bao Dien tu Chinh phu, 1 July 2022, checked 11 September 2026). An instruction of that kind is written because the behaviour it forbids is happening.

Alongside enforcement there is a restoration programme. In August 2022 Hanoi selected 92 structures for renovation and conservation: 30 city-managed villas, 50 centrally-managed villas and 12 valuable architectural works, with priority addresses including 72 Ly Thuong Kiet, 28A Dien Bien Phu and 51 Tran Hung Dao (VnBusiness, 12 August 2022, checked 11 September 2026). No source read for this article reports how many of those 92 have been completed since.

Which buildings are ranked monuments?

Monument rank and villa listing are two separate systems, and only a small number of French-period buildings hold the former. Ranking is done by the Ministry of Culture, Sports and Tourism or, at the highest level, by the Prime Minister, and the Cultural Heritage Department publishes the entries at dsvh.gov.vn. The villa inventory, by contrast, is a Hanoi People's Committee instrument with no ranking effect at all.

Building Heritage status Decision and date
Khu luu niem Chu tich Ho Chi Minh tai Phu Chu tich Special national monument Decision 1272/QD-TTg, 12 August 2009, Prime Minister
Hoa Lo Prison National historical monument Decision 1543 QD/VH, 18 June 1997
Khu pho co Ha Noi (Old Quarter, for contrast) National historical monument Decision 14/2004/QD-BVHTT, 5 April 2004
Long Bien Bridge Not ranked; the stone arch section falls inside the Old Quarter monument Cong van 4299/BVHTTDL-DSVH, 9 October 2017

The Cultural Heritage Department's entry for Hoa Lo gives the prison's colonial identity in detail: the design was approved on 3 June 1896, the French name was Maison centrale, and what survives today is partial - the four-metre brick perimeter walls and the watchtower system among the principal remnants (Cuc Di san van hoa, checked 11 September 2026).

The Presidential Palace grounds carry Vietnam's highest tier. The Prime Minister ranked the Khu luu niem Chu tich Ho Chi Minh tai Phu Chu tich a special national monument by Decision 1272/QD-TTg on 12 August 2009 (Cuc Di san van hoa, checked 11 September 2026). Note what is being ranked: the commemorative site associated with Ho Chi Minh, not the French colonial palace as a work of architecture.

The Opera House is the conspicuous gap in the documentation. Hanoi's own city newspaper reports that in 2011, at the building's centenary, the Opera House and August Revolution Square were designated a national historical and architectural monument by the Ministry of Culture, Sports and Tourism, and gives the construction period as 1901 to 1911 under the French architects Harlay and Broyer, with 870 seats originally and 598 after the 1995-1997 restoration (Ha Noi Moi, 8 August 2021, checked 11 September 2026). The ranking decision number for that designation could not be located in the Cultural Heritage Department's database, and is reported here as a newspaper statement rather than a verified decision.

Which ones can you enter?

Access has almost nothing to do with protection tier, and assuming otherwise will waste your morning. A special national monument can be walked around daily while an unranked villa opens only during a festival week. The table below compares the French-period buildings whose own visiting arrangements could be verified, on the single axis that decides your route.

Building Can you go inside? Verified visiting basis
Hoa Lo Prison Yes, daily 08:00-17:00 every day including holidays and Tet; 50,000 VND (hoalo.vn)
National Museum of History, 1 Trang Tien Yes Adults 40,000 VND, students 20,000 VND, pupils 10,000 VND (baotanglichsu.vn)
Villa at 49 Tran Hung Dao Yes, as a cultural centre Opened to visitors 26 January 2024 (VietnamPlus)
Hanoi Opera House Tour programme exists; current schedule unverified Tours launched 6 September 2017, 400,000 VND, 10:30 Mondays and Fridays (Bao Dien tu Chinh phu)
Bac Bo Phu, 12 Ngo Quyen Normally no Opened to the public for the first time during the Hanoi Creative Design Festival, 9-17 November 2024 (Ministry of Culture, Sports and Tourism)
Listed villas in private or mixed ownership No Nothing in Decision 1845/QD-UBND or Decision 52/2013/QD-UBND creates any right of public access

Read the last row before planning anything. The inventory is a management instrument for owners and district authorities; it confers no visiting rights, publishes no opening hours, and does not mark the buildings on the street. Most of the 1,216 are somebody's home, office or embassy annexe, and the correct way to see them is from the pavement.

The Hoa Lo fee has a legal basis worth knowing if you see an older figure quoted. Hanoi's People's Council amended its visiting-fee regulation, Resolution 06/2020/NQ-HDND, on 6 December 2023, setting Hoa Lo at 50,000 VND alongside the Temple of Literature at 70,000 VND and Ngoc Son Temple at 50,000 VND (Bao Nhan Dan, 7 December 2023, checked 11 September 2026). The prison's own ticket page gives the same 50,000 VND, with half price for students, visitors aged 60 and over, severely disabled visitors and social policy beneficiaries, and free entry for children under 16 (hoalo.vn, checked 11 September 2026).

The villa at 49 Tran Hung Dao is the one restored building on the list that was explicitly a pilot. It reopened on 26 January 2024 as the Trung tam Giao luu van hoa pho cu Ha Noi, a cultural exchange centre run by the Hoan Kiem District People's Committee with technical support from the Region Ile-de-France; the restoration took about a year and cost over 14 billion VND, on a built area of 174 square metres within a 993-square-metre plot (VietnamPlus, 26 January 2024, checked 11 September 2026). The same report notes the villa had no archival documentation beyond a single family photograph, which is the ordinary condition of privately built houses in this quarter.

Who designed Long Bien Bridge?

The Eiffel attribution is repeated constantly and is contradicted by Vietnam's own archives, though it has not gone away. Vietnam's National Archives Centre I published a piece by Dr Dao Thi Dien on 28 December 2022 setting out what the holdings contain: the tender documents, the Governor-General's decrees selecting the contractor, and design drawings bearing the signatures of Dayde and Pille (Trung tam Luu tru quoc gia I, checked 11 September 2026).

The dates in that account are specific. The technical committee selected the Societe Dayde & Pille proposal on 30 December 1897, the Governor-General approved it on 27 January 1898 for 5,900,000 francs, construction began on 12 September 1898, the main work ran from March 1899 to February 1902, and the bridge was inaugurated on 28 February 1902. The article states that Eiffel's firm, identified there as the Societe de Levallois-Perret, took part in the tender unsuccessfully.

What the archives do not do is end the dispute in public. The Eiffel attribution continues to appear in guidebooks, on signage and in general reporting, and this article does not claim the question is closed - only that an official Vietnamese archival body has published a documented contrary account, with named drawings and dated decrees, and that anyone repeating the Eiffel version should be asked what document it rests on.

The bridge's legal status is equally unsettled. Hanoi's Department of Culture, Sports and Tourism proposed ranking Long Bien as a national historical and artistic monument, and the Hanoi People's Committee accepted the proposal on 24 April 2014, asking the Ministry of Transport for its opinion (Trung tam Bao ton di san Thang Long - Ha Noi, checked 11 September 2026). No decision ranking the bridge could be found for this article. What is documented is narrower: the Ministry's Cong van 4299/BVHTTDL-DSVH of 9 October 2017 treats the bridge's stone arch section as lying within the already-ranked Khu pho co Ha Noi monument, which protects the arches rather than the bridge (Cuc Di san van hoa, checked 11 September 2026).

The bridge's condition is an active problem rather than a historical one. On 2 February 2026 a steel connecting plate on span 18 fractured and upper truss members separated at two nodes, and Vietnam Railways imposed an emergency blockade on the Hanoi-Gia Lam section, rerouting passenger trains to terminate at Gia Lam and sending freight over Thang Long Bridge (Dan tri, 6 February 2026, checked 11 September 2026). A bridge that needs emergency structural intervention in its 125th year, while still unranked as a monument, is the clearest single illustration of this article's subject.

What could not be verified?

The central missing number is how many French-period villas Hanoi has lost, and no source read for this article supplies it. The 2022 list carries 37 fewer entries than the 2013 list, but nothing read here states whether those 37 were demolished, reclassified, found not to be villas, or removed for another reason. Treat the difference as a change in a register, not as a demolition count, and be wary of any article that converts one into the other.

No source read here gives a total for French-period buildings of all types in Hanoi. The 1,216 figure is villas only. There is no published equivalent inventory for colonial offices, schools, churches, hospitals or industrial structures, so the honest answer to "how many French colonial buildings remain in Hanoi" is that the city counts one category of them and not the rest.

Several smaller points stayed open. The ranking decision number for the Opera House could not be found in the Cultural Heritage Department's database, so its 2011 designation is reported from Hanoi's city newspaper only. The current price and schedule of the Opera House tour could not be verified; the figures given are those published when the programme launched in September 2017 and may no longer apply. The per-district breakdown of Group 1 read for this article accounts for 201 of the 222 villas, leaving 21 unattributed in that summary. No completion figures could be found for the 92-building restoration programme announced in August 2022. And several Vietnamese government sites - including the Hanoi Department of Tourism and the Ministry of Construction - returned access errors on 11 September 2026 and could not be read.

Whether the villa inventory has been revised since June 2022 could not be established either. Decision 1845/QD-UBND is the most recent version found and read for this article; if a later revision exists, it did not surface in the searches run here.

How should you walk it?

The quarter reads best when you stop looking for a heritage trail and start reading building types, because there is no marked route and the protection is invisible from the street. Three things are legible without any signage, and they map directly onto what this article has covered.

Look at facade versus depth. A Group 2 villa must keep its exterior form but not its interior, so the quarter is full of correct street elevations with modern volumes behind them - visible from side streets and from any point where you can see a building's flank. Once you notice it, you cannot stop noticing it.

Look at height against the cap. Decision 24/2015/QD-UBND holds most of the 507.88-hectare quarter to four to six storeys, so the buildings that break the line are either on the selected large plots allowed eight storeys or they predate the regulation. The skyline is a record of planning decisions rather than of taste.

Look at plot and garden. The 49 Tran Hung Dao restoration was described as unusual for retaining a large garden plot, 174 square metres of building on 993 square metres of land. Garden setback is the fastest way to tell an intact villa parcel from one that has been subdivided, and it is why the streets behind the Presidential Palace feel different from the blocks near the station.

For a half day that actually gets you inside something, the verified sequence is Hoa Lo Prison, the National Museum of History at 1 Trang Tien, and the villa at 49 Tran Hung Dao, with the Opera House exterior and Long Bien Bridge on foot as the two set pieces you look at rather than enter. That is not a long list, and its shortness is the point: a district of 1,216 listed villas offers a visitor a handful of doors.

What is outside this scope?

This article does not cover the Old Quarter's guild streets, which are a ranked national monument under a separate decision and a separate urban logic. It does not evaluate architectural quality, does not list individual villa addresses beyond those named in cited official sources, and does not cover hotels, restaurants or private businesses occupying French-period buildings. Opening hours and prices change; every figure here carries the date it was checked, and none of it was confirmed on site.