Each year, the Heritage Days bring together in September enthusiasts and the curious eager to embark on a quest for our greatest treasures. This time, the cultural event unfolds over the weekend of September 19–20, 2026 in Paris and Île-de-France.
An opportunity to discover surprising places across the Île-de-France region while enjoying numerous cultural offers through visits, often free, as well as novel activities for kids and grown-ups! With family, as a couple, with friends or even solo, everyone can find something to suit thanks to this broad program! Because yes, museums, monuments, castles, and even places usually closed to the public are up for the Heritage Days game, which marks its 43rd edition this year.
So why not take advantage of this exceptional weekend to invest in the Ile-de-France region? While Paris offers a rich program every year, the rest of theÎle-de-France region has nothing to be ashamed of! Just outside Paris, in the Hauts-de-Seine department, you'll find the charming town of Saint-Cloud! It's a place steeped in history, notably through the famous Domaine National de Saint-Cloud. Here's what's in store for you this year!
Heritage Days 2026 at Domaine de Saint-Cloud: the family-friendly program
For the 2026 Journées du Patrimoine, head to the stunning and renowned Domaine national de Saint-Cloud, tucked away in the Hauts-de-Seine. On the agenda this year? Fountain displays, historic walks, or visits to experience on Saturday, September 19 and Sunday, September 20, 2026. [Read more]
City archives
Archive Views - Around Photographic Collections
On the occasion of photography’s bicentennial, this exhibition of documents drawn from Saint-Cloud’s archive collections offers, over two days, a window into the archives’ backstage through the lens of photographic heritage. It aims to reveal to the public a small portion of the city’s preserved photographs while underscoring their essential role— alongside written records—in the construction and transmission of Saint-Cloud’s history. These photographs, sometimes delicate to preserve, will be shown exceptionally for European Heritage Days, viewed through the work carried out behind the scenes by the Heritage and Archives Service in preserving and studying them. The exhibition will foster a dialogue between the photographic archive, the written archive, and the built heritage. It will also question the distinctive status of photography at the intersection of document, object, and work of art. Preserved alternately as a piece of an archive fund and as an element of a heritage collection, photography serves multiple functions and viewpoints, requiring professionals’ expertise to ensure its conservation and promotion. By opening the behind-the-scenes world of patrimonial and archival work, the exhibition aims to make visible a set of fundamental yet often invisible practices: collection, classification, documentation, and above all preventive conservation and research.
Participation requirements: Free | No reservation required
Schedule : Saturday, September 19, 2026 – 9:30 AM – 4:00 PM | Sunday, September 20, 2026 – 9:30 AM – 4:00 PM
International Bureau of Weights and Measures
Guided tour of the International Bureau of Weights and Measures
Hidden in its green oasis on the heights of the Domaine national de Saint-Cloud, the International Bureau of Weights and Measures (BIPM) coordinates the global measurement system. It celebrated its 150th anniversary in 2025.
The BIPM opens its doors again in 2026 for European Heritage Days: a rare opportunity to visit this unique site. Visitors will be able to tour the Breteuil Pavilion, inaugurated by Louis XIV in 1672, its French-style gardens (the Grand Parterre), and the BIPM’s collection of antique instruments, offering a chance to discover the great scientific figures who shaped the BIPM’s history.
Visits will be conducted in small groups (by reservation only), on Saturday, September 19 and Sunday, September 20, 2026. A guided tour lasting approximately one hour and a half.
Information at: jdp@bipm.org or by phone at 01 45 07 70 70.
Participation conditions: Free entry, limited to 30 people per tour. Please note that access to the Parc de Saint-Cloud may be charged during Heritage Days. - Free | Booking required - https://form.jotform.com/BIPM/JEP-2026, https://passculture.app/offre/429567542
Hours: Saturday, September 19, 2026 — 11:00–12:30, 13:30–15:00, 16:00–17:30, 18:30–20:00 | Sunday, September 20, 2026 — 13:30–15:00, 16:00–17:30, 18:30–20:00
City Hall
Visit to Saint-Cloud Town Hall
We look forward to welcoming you for a tour of the Town Hall, a landmark of our commune’s heritage. During this visit, you’ll explore the building’s history and architecture—its construction, backed by Napoleon III, took place under trying conditions amid the 1870 war—and the urban context in which it stands. You’ll also gain insight into the key chapters of the city’s story, from its founding to its current development. This discovery will help deepen your understanding and foster discussion about the identity of our territory. Finally, you can extend your visit with the exhibition in the wedding hall organized by the Heritage and Archives Service, dedicated to its photographic collections.
Participation conditions: Limited to 10 people - Booking required | Free - patrimoine@saintcloud.fr, 0147715316
Schedule: Saturday, September 19, 2026 — 3:00 PM to 4:00 PM | Sunday, September 20, 2026 — 3:00 PM to 4:00 PM
Dates and Opening Time
From September 19, 2026 to September 20, 2026
Location
Domaine national de Saint-Cloud
1 Avenue de la Grille d'Honneur
92210 Saint Cloud
Route planner
Access
Metro: Line 10 terminus Boulogne-Pont de St-Cloud, By streetcar: T2 [Pont de Bezons-Porte de Versailles], stop Parc de St-Cloud By bus: Lines 52, 72, 126, 175, 460, 467, stop Parc de St-Cloud Line 160 terminus Pont de St-Cloud-Albert Kahn Line 260 stop Rhin et Danube-Musée Albert Kahn
Official website
www.saintcloud.fr
