The Journées du Patrimoine (Heritage Days) are probably at the top of the list. This annual cultural event, usually held on the third weekend of September, awaits you in the four corners of Europe to offer you a fine program of often free visits andoriginal activities at the heart of heritage treasures. In Paris and the Île-de-France region, you won't want to miss out on this ballet of cultural highlights, as the Paris region is sure to surprise you at every edition!
The Journées du Patrimoine are also a great opportunity to discover the treasures of theÎle-de-France region through places and monuments that are still too little known! Why not take advantage of this year's event to conquer the heritage gems of the Hauts-de-Seine department?
Just what you need: Boulogne-Billancourt , on the outskirts of Paris, offers an extremely rich and varied program of events to keep you busy for at least a day. Boulogne-Billancourt is a multi-faceted city, with its urban areas, village districts, peaceful banks of the Seine and lush woodland landscapes. You'll have the chance to explore the city in all its many facets during the Heritage Days.
Journées du Patrimoine 2026 : visit to the Mongolian Embassy in Boulogne-Billancourt (92)
On the occasion of European Heritage Days, the Mongolian Embassy in Boulogne-Billancourt will exceptionally open its doors to you on September 19, 2026. What's on the program? A cultural immersion into the wonders of this beautiful country. [Read more]
Heritage Days 2026 at the fashion photographer Frank Horvat's studio in Boulogne-Billancourt
Frank Horvat's studio-home, the workshop-house of the legendary fashion photographer, opens its doors for Heritage Days 2026 on September 19. In this Boulogne-Billancourt studio, discover half a century of photographs and archives, commented by the artist's own daughter! A must-attend event for fashion enthusiasts. [Read more]
Step back into the 1930s during Heritage Days with a museum devoted to Boulogne-Billancourt!
For Heritage Days 2026, the Museum of the 1930s invites you to travel back in time with a special program on the weekend of September 19–20, 2026. [Read more]
In Boulogne-Billancourt, follow in the footsteps of Paul Belmondo for the 2026 Heritage Days.
Dive into the world of sculptor Paul Belmondo during Heritage Days 2026 and explore his work in Boulogne-Billancourt for this weekend of September 19–20, 2026. [Read more]
Loto Studios to Open Specially for Heritage Days 2026
On the occasion of the European Heritage Days 2026 and to celebrate the Loto’s 50th anniversary, FDJ United studios will exceptionally open their doors to the public for the very first time. Discover the history and the behind the scenes of the famous draws in Boulogne-Billancourt on September 19 and 20. [Read more]
Heritage Days 2026: Here's what you can expect at the Albert-Kahn Garden Museum (92)
The Albert-Kahn Garden Museum participates in the 43rd Heritage Days, on Saturday, September 19 and Sunday, September 20, 2026. Take advantage of this weekend to visit the museum and discover its astonishing program! [Read more]
Heritage Days 2026 at La Seine Musicale (92): a musical stroll!
The Seine Musicale takes part in Heritage Days 2026 and, true to itself, treats us to a musical stroll. Join us on Saturday, September 19, 2026. [Read more]
The guided tours for Heritage Days 2026 in Boulogne-Billancourt
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at the Boulogne-Billancourt Municipal Archives
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at Notre-Dame Church in Boulogne-Billancourt
Guided tour of Notre-Dame-de-Boulogne Basilica
One of the few remaining witnesses to Boulogne’s medieval past, the church built at the behest of Philip IV the Fair is also notable for its 19th-century restoration. Since January 2025, the city’s oldest church has been elevated to a basilica, the first in Hauts-de-Seine. It is currently undergoing conservation work.
Participation requirements: Free | No reservation required
Schedule: Sunday, September 20, 2026 — 2:00 PM to 3:00 PM
Organ recital at the Basilica of Notre-Dame-de-Boulogne
Johann Sebastian Bach's works performed by Didier Seutin, choir director.
Participation terms: Free | No reservation required
Schedule: Sunday, September 20, 2026 — 3:00 PM to 4:00 PM
Discovery of the organ at the Basilica of Notre-Dame-de-Boulogne
“All hands on the keyboards!” A participatory exploration of the organ.
Participation requirements: Free | No reservation required
Schedule: Sunday, September 20, 2026 — 3:45 PM to 4:30 PM
Heritage Days 2026 at Boulogne's United Protestant Church
Conference with Guillaume Monod on “Humility in Medicine: A Clinical, Philosophical, and Theological Approach”
Guillaume Monod is a psychiatrist and child psychiatrist, holds a PhD in philosophy, and is an associate member of the Hannah Arendt Interdisciplinary Laboratory for the Study of Politics. He serves on the board of the John Bost Foundation and sits on the Justice and Prisons Chaplaincy Commission of the Protestant Federation of France.
Participation conditions: Free admission - Olivier Hall (entrance via the garage door) - Free | No reservations required
Times: Saturday, September 19, 2026 — 5:00 PM to 6:00 PM
Concert by the chamber choir Les Divertissements
The program offers a musical journey from darkness to light.
It opens with a prayer penned on the eve of World War II by Francis Poulenc, steeped in unease and ardor.
Gradually, the tension tightens through the subsequent pieces, with pain expressed—most notably by Josef Gabriel Rheinberger—before giving way to a fragile yet real hope. With Gioachino Rossini and Georg Friedrich Handel, the impulse becomes bolder, more assured. It reaches its peak in Franz Schubert’s luminous grandure, celebrating liberation and life’s victory over fear.
A profoundly human journey, moving through suffering to find peace.
Site: https://lesdivertissements.fr/
Participation conditions : Free admission - Voluntary contributions welcome - Free | No reservation required
Schedule : Sunday, September 20, 2026 - 3:30 PM to 4:30 PM
Heritage Days 2026 at the Saint Nicholas the Thaumaturge Orthodox Church in Boulogne-Billancourt
Visit to the Saint Nicholas the Thaumaturge Orthodox Church
Self-guided visit.
Participation conditions: Free | No reservation required
Schedule: Saturday, September 19, 2026 — 2:00 PM to 6:00 PM
Heritage Days 2026 at the Boulogne-Billancourt Synagogue
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at the Orthodox Church of Saint Thérèse of the Child Jesus in Boulogne-Billancourt
Self-guided tour of Sainte-Thérèse-de-l’Enfant-Jésus Church
Self-guided tour.
Participation conditions: Free | No reservation required
Hours: Saturday, September 19, 2026 — 9:00 AM–7:00 PM
Guided tour of Sainte-Thérèse-de-l’Enfant-Jésus Church
Guided tour.
Participation terms: Free | No reservation required
Schedule: Sunday, September 20, 2026 — 3:00 PM to 4:00 PM
Heritage Days 2026 in Boulogne-Billancourt, the 1930s route
Architectural journeys of the 1930s
A city of modernity, Boulogne-Billancourt proved a particularly fertile testing ground for 20th‑century architecture. Architects cut their teeth there, including Le Corbusier, Mallet-Stevens, Lurçat…
Participation requirements: Free | No reservation required
Hours: Saturday, September 19, 2026 — 2:30 PM to 4:00 PM, 4:30 PM to 6:00 PM | Sunday, September 20, 2026 — 10:30 AM to 12:00 PM, 2:30 PM to 4:00 PM, 4:30 PM to 6:00 PM
Heritage Days 2026 at the Issy-les-Moulineaux stopover in Boulogne-Billancourt
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at the Saint-François-de-Sales Parish House in Boulogne-Billancourt
Visit to the Saint-François-de-Sales Family Center
A Church House named after the patron saint of journalists. Its architecture, in its bold volumes and its materials (wood, concrete, glass and steel), signals a desire to blend with the urban landscape along the banks of the Seine and to welcome its residents there.
Participation requirements: Free | No reservation required
Schedule: Saturday, September 19, 2026 — 9:30 a.m. to 12:30 p.m.
Guided tours of the Saint-François-de-Sales Family House
A church-house named after the patron saint of journalists. Its architecture, in its volumes and materials (wood, concrete, glass and steel), signals the desire to blend into the Seine riverfront's urban landscape and welcome its inhabitants there.
Participation requirements: Free | No reservation required
Schedule: Saturday, September 19, 2026 — 10:30–11:30, 3:00–4:00 PM
Heritage Days 2026 at the Lutecien Association of Geology, Mineralogy and Paleontology in Boulogne-Billancourt
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at Boulogne-Billancourt’s West Cemetery
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at Pierre Grenier Cemetery
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at the Boulogne-Billancourt City Hall
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Visit to the municipal archives storage facilities
Archivists lead you on an exciting journey into their craft, granting you exceptionally rare access to the conservation storage facilities where the city’s memory is carefully safeguarded, away from prying eyes.
Participation conditions: Free | Booking required - archives-SDL@mairie-boulogne-billancourt.fr,
Schedule: Saturday, September 19, 2026 — 10:00 to 11:00
Escape Room: "Panic in the Archives!"
"Thief!" The archivist spotted you hiding the city’s founding document in your bag and trying to makes a run for it. To stop you, he locked you in the reading room and rushed off to call the police. You have 60 minutes to escape and avoid ending up in a cell. To pull it off, you’ll need to put yourself in the archivist’s shoes, think and act like him. Will you make it out in time? An adventure that dives into the heart of the city’s history. 3 showtimes Sunday, September 20 at 2:00 PM, 3:30 PM and 5:30 PM.
Participation requirements: Teams of 4-6 people - Free | Booking required - archives-SDL@mairie-boulogne-billancourt.fr,
Timings: Sunday, September 20, 2026 - 2:00 PM ⤏ 3:00 PM, 3:30 PM ⤏ 4:30 PM, 5:30 PM ⤏ 6:30 PM
Guided tour of Boulogne-Billancourt City Hall
Tony Garnier, the Grand Prix de Rome–winning architect, and André Morizet, the senator-mayor of Boulogne-Billancourt, join forces to deliver, in 1934, a new town hall, a symbol of Boulogne and Billancourt’s union.
Participation requirements: Free | No reservation required
Schedule: Sunday, September 20, 2026 — 2:00 PM to 3:00 PM, 3:00 PM to 4:00 PM
Boulogne choirs in concert
Artichoke Choir, Harmony Choir, La Lupinelle, The Imaginary Stage, Life Through the Voice, Peeda’s Gospel.
Participation requirements: Free | No reservation required
Schedule: Sunday, September 20, 2026 – 4:00 PM–5:30 PM
Heritage Days 2026 at the Marie Walewska House in Boulogne-Billancourt
Guided tours of the Marie-Walewska House
A house rented by Napoleon I in 1811-1812 to host his young mistress, Countess Marie Walewska. Exteriorly intact but emptied of its contents, it nevertheless bears traces of the lavish interior it once housed. Long neglected, it has been listed in the National Monuments Inventory since 1986.
Participation requirements: Free | Reservation required - jep2026@otbb.org, 01 41 41 54 54,
Schedule: Sunday, September 20, 2026 — 11:30–12:30, 14:00–15:00
Heritage Days 2026 at the Paul Landowski Museum in Boulogne-Billancourt
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
The Heritage Days 2026 at the Point du Jour Residence in Boulogne-Billancourt
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at the Boulogne-Billancourt Protestant Temple
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at the Boulogne-Billancourt Tourist Office
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at the Pavilion of Projects
A discussion of the work of Chloé Quenum: The Madness of Seguin Island
The first work in the artistic program “Voyage en Industries,” La Folie de l’île Seguin grew out of a close collaboration between artist Chloé Quenum and former Renault-Billancourt workers. Installed near the Daydé bridge, which once led to the entrance of the Île Seguin factory, it is built from spare parts drawn from Renault models produced before the site closed.
Completed in the summer of 2026 and unveiled to the public to mark the opening of the Daydé bridge, La Folie de l’île Seguin will lie at the heart of this encounter. The artist and several witnesses from Renault-Billancourt’s industrial history will share the behind-the-scenes story of the piece’s creation, their memories of the site, and the exchanges that fed the project.
The gathering, organized at the Pavilion of Projects, will be followed by a guided tour of the work with the artist and the witnesses.
Rendez-vous at the Pavilion of Projects
https://ileseguin-rivesdeseine.fr/fr
Participation terms: free - Free | Booking required - https://www.ileseguin-rivesdeseine.fr/fr/events/rencontre-autour-de-loeuvre-de-chloe-quenum-la-folie-de-lile-seguin
Schedule: Saturday, September 19, 2026 — 11:00 a.m.–12:30 p.m.
Guided tour “Discovering the Sculptures of Île Seguin” with an artistic surprise
The new public spaces on Île Seguin, gradually opening from January to July 2026, host a remarkable collection of contemporary sculptures that engage with the site’s history and landscapes.
The Parc départemental Gauthier Mougin’s art trail explores ideas of trace, memory and imprint through works by Peter Stampfli, Marta Pan, Didier Marcel, Jacques Villeglé, Jean-Charles de Castelbajac, among others. On the forecourt of Pointe des Arts, pieces in varied visual languages, including works by Erik Dietman and Stefan Rinck, invite a sensitive and playful exploration.
Arriving on Île Seguin via the Daydé Bridge is marked by an original creation from Chloé Quenum, La Folie de l’île Seguin, honoring the former Renault factory workers. This work is also associated with the “Create” stop on the “Voyage en Industries” route.
Set off to discover these works that turn Île Seguin into a genuine open-air museum, made possible thanks to the support of the Hauts-de-Seine Department, the City of Boulogne-Billancourt, the Emerige Endowment Fund, the Centre national des arts plastiques (CNAP) and the Île-de-France Regional Fund for Contemporary Art (FRAC).
At the end of your visit, an artistic surprise awaits… keep your eyes peeled!
See you at the Pavilion of Projects
https://ileseguin-rivesdeseine.fr/fr
Participation conditions : Registration on our website is free - https://ileseguin-rivesdeseine.fr/fr | Reservation required
Schedule: Saturday, September 19, 2026 — 2:00 PM to 3:30 PM
Guided tour “Journey Through Industry” with AMETIS’ memory keepers
Follow the "Voyage in Industries" route with the memory guides from the Association de la maîtrise, de l’encadrement et des techniciens de l’Île Seguin (AMETIS). Through their testimonies, get the region’s industrial history from a lively, profoundly human perspective.
On this occasion, also admire the first work along the route, La Folie de l’île Seguin by artist Chloé Quenum. Created near the former entrance to the Seguin Island factory, it pays tribute to all the workers and technicians who shaped the site's history.
Participation conditions: Reserve on our website — Free; Booking required — https://ileseguin-rivesdeseine.fr/fr
Schedule : Saturday, September 19, 2026 – 3:00 PM to 4:30 PM
Guided tour “Voyage en Industries” with Emmanuelle Dupuy
Follow the "Voyage in Industries" journey with Emmanuelle Dupuy, a former Renault-Billancourt employee, feminist activist and co-founder of the "women's group." Through her testimony, discover the territory's industrial history from a vivid and deeply human perspective.
On this occasion, also admire the inaugural artwork of the route, La Folie de l’île Seguin by artist Chloé Quenum. Created near the former entrance to the Seguin Island factory, it pays tribute to all the workers and technicians who helped shape the site's history.
Rendez-vous at the Pavilion of Projects
https://ileseguin-rivesdeseine.fr/fr
Participation requirements: Register on our website — Free | Booking required — https://ileseguin-rivesdeseine.fr/fr
Schedule: Sunday, September 20, 2026 — 11:00 AM–12:30 PM
Interview with artist Stefan Shankland: a “Marble From Here” sculpture for the heart of Billancourt Park
Stefan Shankland’s work draws on natural and human transformation processes that shape the landscape. Flossile is a horizontal sculpture conceived for Billancourt Park, built from more than 25 tons of rubble recovered from demolition and construction sites that are reconfiguring the district. At ground level, the mineral image it creates suggests, in turn, the flows and meanders of a river, geological strata, or the traces of the automotive industry that have traversed and shaped Boulogne-Billancourt over the 20th century.
Starting in 2025, the creation of this nearly 65-meter-long piece enters a decisive phase: on-site production, which will run through November 2026. On this occasion, come meet Stefan Shankland near the project site to discover his approach, chat with him, and see the project as it takes shape.
Meet at the foot of the Daydé Bridge, at the 42 bus stop
https://ileseguin-rivesdeseine.fr/fr
Participation requirements: Meet at the foot of Daydé Bridge, at the 42 bus stop - Free | Reservations required - https://www.ileseguin-rivesdeseine.fr/fr/events/rencontre-avec-lartiste-stefan-shankland-une-oeuvre-pour-le-coeur-du-parc-de-billancourt
Schedule: Sunday, September 20, 2026 — 2:00 PM to 3:30 PM
Guided tour "Journey into Industry" with ATRIS’s memory keepers
Follow the “Voyage en Industries” journey with the memory guides from the Association of Retired Renault-Billancourt Workers of Île Seguin (ATRIS). Through their testimonies, discover the region’s industrial history from a vivid, deeply human perspective.
On this occasion, also take in the first artwork of the route, La Folie de l’île Seguin by artist Chloé Quenum. Created near the former factory entrance on Île Seguin, it pays tribute to the many workers and technicians who helped shape the site’s history.
Meet at the Pavilion of Projects
Participation conditions: Reserve on our website - Free | Booking required - https://ileseguin-rivesdeseine.fr/fr
Schedule: Sunday, September 20, 2026 — 3:00 PM to 4:30 PM
Family workshop for children aged 6–11: “Memory Madness”
For more than a century, the story of Île Seguin has been inseparably linked to Renault. The island was a shipyard-scale factory, home to foundry, forge, textile, rubber, and cardboard workshops that produced a multitude of industrial parts. It’s from reproductions of some of these parts that Chloé Quenum has revived the tale and created her work, "Seguin’s Folly." Through a collection of shapes and textures, children will craft their own Folly, linking memory with imagination, the past with the present, and history with inspiration. To do this, students will build a scale model using a cardboard frame, and a materials kit will be provided.
Meet at the Pavillon des projets
https://ileseguin-rivesdeseine.fr/fr
Participation requirements: Booking on our website - Free | Reservation required - https://ileseguin-rivesdeseine.fr/fr
Schedule: Sunday, September 20, 2026 — 3:30 PM to 5:00 PM
Heritage Days 2026 at the Walewska House in Boulogne-Billancourt
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at the Landowski Amphitheatre in Boulogne-Billancourt
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at Espace Landowski in Boulogne-Billancourt
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at the Amicale Salmson in Boulogne-Billancourt
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at the Federation of Renault Group Regional Amicales (FARGR) in Boulogne-Billancourt
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Heritage Days 2026 at Georgette Bœuf Garden in Boulogne-Billancourt
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Dates and Opening Time
From September 19, 2026 to September 20, 2026
Location
Boulogne-Billancourt Town Hall
26 Avenue André Morizet
92100 Boulogne Billancourt
Route planner
Accessibility info
Official website
www.boulognebillancourt.com
