European Heritage Days 2026: Unveiling Paris’s Hidden Gems
Paris, July 24, 2026 – The highly anticipated European Heritage Days are set to return on Saturday, September 19, and Sunday, September 20, 2026. This exceptional cultural event invites the public to discover over 1,500 sites across Paris and the Île-de-France region. While iconic museums and monuments are always part of the program, this year’s edition offers a special focus on exploring secret, little-known, or usually inaccessible locations.
For this 2026 edition, why not venture off the beaten path? Beyond the well-trodden tourist attractions, visitors will have the chance to uncover hidden places in Paris that often remain in the shadows. These include lesser-known historical sites, discreet monuments, and even venues typically closed to the public, all opening their doors for an extraordinary weekend.
What are these unknown places to visit?
Do you think you know Paris inside out? The European Heritage Days promise many surprises with hidden gems worth discovering. This is an ideal opportunity to explore historical and cultural buildings often overlooked by the general public. Among these are private buildings, elegant private mansions, secret gardens, and archives and collections rarely exhibited.
The Île-de-France region also abounds with hidden heritage treasures. Old, less-frequented monuments, historic residences, discreet churches, and confidential museums are all waiting to be discovered. The 2026 edition of the European Heritage Days invites you to explore these often-ignored jewels, nestled in the small towns of the region.
Don’t know these secret places? That’s perfectly normal; we are here to help you discover them! For the occasion, we offer you a selection that should enrich your Parisian and Île-de-France culture.
The European Heritage Days are an opportunity to visit sites we don’t know, places that are not usually open. Did you think you knew everything about Paris and its surroundings? Prepare to be surprised…
Featured Hidden Gems for European Heritage Days 2026:
- Cité Falguière: A hidden artistic treasure in Paris, offering a unique journey into the capital’s artistic history on September 19 and 20.
- Jean Monnet House (Bazoches, 78): Discover the house of Jean Monnet in Bazoches-sur-Guyonne, Yvelines, on September 19 and 20.
- Musée de la Chasse et de la Nature: Enjoy a free visit to the museum and its exhibition on September 19 and 20.
- Paris Observatory: A free visit to the historic building on Sunday, September 20.
- Institut national d’histoire de l’art (INHA) and its library: Free visits and activities for the whole family on September 19 and 20, offering access to a building usually reserved for students and researchers.
- Hôtel de Charost, Residence of the British Ambassador: An exclusive opportunity to explore this ordinarily inaccessible location on Saturday, September 19 (by reservation).
- Le Monde Newspaper Headquarters: An exceptional opening of the new premises for a free visit and a festival of events (reservation required).
- Maison Élysée, Presidential Palace Museum: Dive into the behind-the-scenes of the republican scene on September 19 and 20.
- Bucherer House: Explore the world of watchmaking and admire mythical timepieces on Saturday, September 19.
- Polish Library in Paris: Discover this little-known gem and its three confidential museums (Adam Mickiewicz Museum, Biegas Museum, and Frédéric Chopin Salon) on Saturday, September 19.
- Banque de France: An exceptional opening of the Hôtel de Toulouse, offering a visit to its gilded gallery and state rooms on Saturday, September 19.
- Louvre Museum Art Workshops: An exclusive chance to learn about their unique expertise (by registration) on September 19 and 20.
- Caveau du Saint-Esprit (Provins, 77): A fascinating underground visit in Seine-et-Marne on September 19 and 20.
- Royal Castle of Montceaux (77): Discover the remains of the Royal Castle of Montceaux in Seine-et-Marne on September 19 and 20.
- Trajan Tower (91): Explore this ancient Roman column in Méréville, Essonne, on September 19 and 20.
- Hôtel Pereire – Fondation Del Duca: Immerse yourself in Parisian heritage and explore this historic building on September 19 and 20.
- Saint-Denis (93): Discover numerous captivating sites in Saint-Denis, Seine-Saint-Denis, on September 19 and 20.
- Musée des Arts et Métiers Reserves (Saint-Denis, 93): An opportunity to visit the reserves housing over 80,000 objects (registration required) on Saturday, September 19.
- Moulin de la Tour (Ivry-sur-Seine, 94): The last standing mill in Val-de-Marne opens its doors on September 19 and 20.
- Pina Bausch Conservatory (Montreuil, 93): Rediscover this recently renovated architectural gem from the 70s on September 19 and 20.
- Embassy of Italy in France: An exceptional visit to a historic mansion on Saturday, September 19 (reservation required).
- Jacques Doucet Library: The library of a famous Belle Époque couturier opens exceptionally to the public on September 19 and 20.
- Russian Orthodox Center: Discover the spiritual and cultural center alongside the Holy Trinity Cathedral on September 19 and 20.
- Air-raid shelter in Bourg-la-Reine: Dive into history and explore a genuine World War II air-raid shelter on September 19 and 20.
- Étang de la Galiotte (78): Escape to a surprising floating village in Carrières-sous-Poissy on September 19 and 20.
- Maison de l’Amérique latine: A rare visit to this historic place with private mansions and hidden gardens (by reservation) on Sunday, September 20.
- Museum of the Prefecture of Police: Explore real objects and meet professionals on September 19 and 20.
- Ferrari House (92): A legacy of the Duchess of Galliera in Clamart, Hauts-de-Seine, on September 19 and 20.
- Institute of Human Paleontology: This institute, created by Prince Albert I of Monaco, opens its doors exceptionally on September 19 and 20.
- Museum of Life of Yesteryear (77): Discover this little-known museum in Seine-et-Marne with historical reenactments on September 19 and 20.
- Claude Monet’s Impressionist House (Argenteuil, 95): Welcome to Argenteuil on September 19 and 20.
- Hôtel de Salm, Grand Chancellery of the Legion of Honor: A special visit during this 43rd edition on September 19 and 20.
- Orville Archaeological Site (Louvres, 95): This archaeological site opens its doors to the public on September 20 and 21, 2025.
- Fort de Cormeilles-en-Parisis: Visit this former military fort with reenactors in period costumes on Sunday, September 20.
- Château de la Celle-Saint-Cloud (78): Exceptionally discover the magnificent gardens of this property on September 19 and 20.
- Hôtel de Roquelaure, Ministry of Ecological Transition: Unveils its program for the weekend of September 19 and 20.
- Crypt of the English Benedictine Convent (Pontoise): Explore this historic site exceptionally open to the public on September 19 and 20.
- Maison Saint-Sulpice: An exceptional visit to this 17th-century former seminary on Saturday, September 19.
- Château de Montagu (91): Discover the ruins and the Henri IV tower on September 19 and 20.
- Valentin Haüy Museum: Dedicated to the history of the blind, opens its doors on Saturday, September 19.
- Paris Sewer Museum: An unusual visit beneath the streets of Paris on September 19 and 20.
- Victor Hugo Literary House (Bièvres, Essonne): Free entry, treasure hunt, and music on September 19 and 20.
- Singer Polignac Foundation: Discover the sumptuous state rooms of this private mansion on September 19 and 20.
- Sainte-Geneviève des Bois (91): A rich program of visits to discover the treasures of this town on September 19 and 20.
- Japanese Gardens of Favières (77): Open at a preferential rate on September 19 and 20.
- Museum of the Army Health Service (Val-de-Grâce): Discover the program for the weekend of September 19 and 20.
- Seminar of Foreign Missions and its secret museum: Explore this little-known museum on September 19 and 20.
- Museum of Pharmacy: A guided tour of the headquarters of the National Order of Pharmacists on September 19 and 20.
- Regard de la Lanterne (19th arrondissement): A secret place to visit on Saturday, September 19.
- Museum of Radiology and Medical Imaging: Unveils its program for enthusiasts of science and medical technologies on September 19 and 20.
- Maison La Roche – Le Corbusier Foundation: This modernist construction opens its doors on September 19 and 20.
- Gare Saint-Lazare: Behind-the-scenes guided tours (by registration) on September 19 and 20.
- The Visionnaire, L’Oréal Group Headquarters: Exceptional opening for free visits on September 19 and 20.
- Museum of Counterfeiting: A secret lair where truth and falsehood clash on September 19 (free, by reservation).
- Paris Catacombs: Discover the program awaiting you in the capital’s underground on September 19 and 20.
- Maison du Vitrail: Explore the fascinating world of stained glass from September 18 to 20.
- Clemenceau Museum: Visit the apartment and garden of the former President of the Council on September 19 and 20.
- Maison du Fontainier: Dive into the history of water in Paris on September 19 and 20.
- Auguste Comte House: Unveils its program for the weekend of September 19 and 20.
- Rosny Rail Museum (93): Discover the train museum in Seine-Saint-Denis on Saturday, September 19 and Sunday, September 20.
- Grande Loge de France: An exceptional visit to this mysterious institution on September 19 and 20.
- Paris Administrative Court of Appeal – Hôtel de Beauvais: Discover this classified monument on September 19 and 20.
- Espace Niemeyer, French Communist Party Headquarters: Explore this iconic and futuristic building on September 19 and 20.
- Saint-Serge de Radonège Orthodox Church: One of the most unusual treasures of the 19th arrondissement opens its secrets on September 19 and 20.
- Covered Passages of Paris: Rediscover the charm of Parisian streets on September 19 and 20.
- Château de la Reine Blanche: Visit this astonishing residence in the heart of the 13th arrondissement on September 19 and 20.
- Expiatory Chapel: This little-known monument in the heart of the capital reveals its secrets on September 19 and 20.
- Saint-Stephen Greek Cathedral: Discover this little-known place in the City of Light on September 19 and 20.
- Eiffel Wind Tunnel: Visit this over 120-year-old aerodynamic laboratory still in operation on September 19 and 20.
- Grande Loge Féminine de France: Discover this hidden treasure and the mysteries of female Freemasonry on September 19.
- Bourse du Travail de Paris: Organized visits during the European Heritage Days on September 19 and 20.
- Refectory of the Monks, National Conservatory of Arts and Crafts: Discover this unjustly little-known gem on September 19 and 20.
- Viaduc des Arts: Discover this astonishing place in eastern Paris on September 19 and 20.
- Claude de Soria’s Studio: Immerse yourself in the world of the famous sculptor on September 19 and 20.
- King’s Cellars (Sèvres): Explore the history hidden beneath the city on September 19 and 20.
- Cognacq-Jay Museum: This little-known museum in the heart of the 3rd arrondissement opens its doors to all visitors on September 19 and 20.
Which secret place(s) will you discover this year?
Source: https://www.sortiraparis.com/actualites/journees-du-patrimoine/guides/172673-journees-du-patrimoine-a-paris-2026-les-lieux-secrets-meconnus-ou-caches-a-decouvrir-absolument
