Journées du Patrimoine Val-d'Oise

The Ministry of Culture's portal lists 130 sites opening their doors in Val-d'Oise on Saturday, September 19th and Sunday, September 20th, 2026, across 52 municipalities, offering 244 tours, workshops, concerts, and exhibitions. The list continues to grow leading up to the weekend: detailed information for each site, including updated schedules and booking links, is available at journeesdupatrimoine.culture.gouv.fr. A selection by area is provided below.

Friday, September 18th, 2026: Preview Day

• 7:00 PM — "Musée Hom(m)e", a performance by Compagnie Uvol · La Fabrique du musée, Gonesse · free, booking required
• 7:00 PM-11:00 PM — Immersive role-playing game on local history · Ludothèque Bernard-Tronchet, Saint-Brice-sous-Forêt · ages 12+, booking required (also Saturday 2:00 PM-6:00 PM)
• 6:00 PM-8:00 PM — Opening of the exhibition "Le temps d'un café chez les Tagliana" · La Maison Rose de Wallerand, Auvers-sur-Oise (also Saturday and Sunday 11:00 AM-6:00 PM)
• Two events are reserved for school groups as part of the "Levez les yeux !" operation: a tour of the Taverny fire and rescue center (10:00 AM and 2:00 PM) and a Gallo-Roman artifact hunt at the Micro-Folie in Taverny (10:30 AM and 2:30 PM)

Pontoise

• Val-d'Oise Departmental Archives, 3 avenue de la Palette · exhibition "Face à l'objectif. Une histoire du portrait en photographie", part of the Bicentennial of Photography, Saturday and Sunday 10:00 AM-6:00 PM, with activity booklets and a photo studio · behind-the-scenes tours with an archivist at 10:30 AM, 2:30 PM, and 4:30 PM both days, booking required · junior workshops at 3:30 PM both days: costume photo session and photo-card making on Saturday (ages 7+), photo frame decoration on Sunday (ages 5+), booking required
• Saint-Maclou Cathedral · guided tour by the tourist office, continuous Saturday and Sunday 2:30 PM-4:30 PM · sacristy tour by sacristan Kévin Dupuy, Saturday 2:00 PM-6:00 PM and Sunday 2:00 PM-5:00 PM · organ concert by Philippe Bardon Sunday 5:00 PM · "Déambulation circassienne" by Compagnie Freikopf in the city center, Sunday 3:00 PM-4:30 PM
• Carmel Saint-Joseph, 55 rue Pierre-Butin · founded in 1605 by Madame Acarie, this is the oldest active Carmelite convent · self-guided tours Saturday 2:00 PM-6:00 PM and Sunday 10:00 AM-6:00 PM · dual-voice guided tours Saturday 2:00 PM and 3:00 PM, Sunday 10:00 AM and 11:00 AM · lectures on the history and heritage of the Carmel Saturday 2:30 PM, Sunday 10:30 AM and 2:30 PM · meet the Carmelite sisters in the grand parlor Saturday 3:30 PM, Sunday 3:00 PM and 3:45 PM · concert by the Pontoise Vocal Ensemble in the chapel Sunday 3:00 PM (45 min) · exhibition of old maps "Pontoise in 1690" and sale of artisanal products made by the sisters
• Musée d'Art et d'Histoire Pissarro-Pontoise, 17 rue du Château · self-guided tours Saturday 11:00 AM-12:30 PM and 1:30 PM-6:00 PM, Sunday 11:00 AM-6:00 PM · 45-minute flash guided tours Saturday 11:30 AM, 2:30 PM, and 4:00 PM · scavenger hunt for children · self-guided tour of the small quarry and casemates of the former royal castle, Saturday 2:00 PM-6:00 PM and Sunday 10:00 AM-6:00 PM
• Cave des Moineaux, place des Moineaux · guided tours every 30 min Saturday and Sunday 2:00 PM-6:00 PM · self-guided tour Sunday 10:00 AM-1:00 PM
• Cave de la Bretonnerie, 16 rue de la Bretonnerie · exhibition "L'art prend de la profondeur : la Team Photo s'invite dans une cave médiévale", featuring ten photographers, Saturday and Sunday 10:00 AM-6:30 PM
• Underground Chapel of the Presbytery, 25 rue Thiers · self-guided tour Saturday 2:00 PM-6:00 PM, Sunday 10:00 AM-6:00 PM · guitar performance by Fabien Vilpoix Saturday and Sunday 3:00 PM-5:00 PM
• Crypt of the English Benedictine Convent, 1 chemin du Clos des Anglaises · Saturday 2:00 PM-6:00 PM, Sunday 10:00 AM-12:00 PM, booking required
• Underground passage of the Général-Leclerc staircase · former cellar carved into the cliffside, self-guided tour Saturday 2:00 PM-6:00 PM, Sunday 10:00 AM-6:00 PM
• Four de l'Hermitage, opposite 19 rue Adrien-Lemoine · "Pain du Patrimoine", continuous baking Saturday and Sunday 10:00 AM-6:00 PM · discover the troglodytic oven Saturday 2:00 PM-6:00 PM, Sunday 10:00 AM-6:00 PM
• Boat Shed, 45 bis quai Eugène-Turpin · restored in 2024, Saturday 2:00 PM-6:00 PM and Sunday 10:00 AM-6:00 PM, with volunteers from Pontoise Patrimoine
• Masonic Lodge Les Amis du Peuple, 4 rue des Tables-Rondes · guided tours of the temple Saturday 2:00 PM-6:00 PM, Sunday 10:00 AM-6:00 PM
• Carré Patrimoine – CIAP, 4 rue Lemercier · tour with 3D modeling and audio guides, Saturday 2:00 PM-6:00 PM, Sunday 10:00 AM-6:00 PM
• City Hall · tour of the municipal archives with Gérald Tastet Sunday 2:00 PM · meet Mayor Stéphanie Von Euw in her office Sunday 3:00 PM · guided tour of the Reg'Art open-air exhibition Sunday 4:00 PM, booking required
• Courthouse, 3 rue Victor-Hugo · tour with a Pontoise bar lawyer Sunday 2:00 PM and 3:30 PM, booking required, ID required
• Notre-Dame Church · self-guided tour Saturday 2:00 PM-6:00 PM and Sunday 10:00 AM-6:00 PM: 13th-century miraculous Virgin and reliquary tomb of Saint Gautier de Pontoise
• Guillaume-Apollinaire Library · comic book exhibition "Bulles de mémoire" created by the Chabanne middle school defense class, Saturday 10:00 AM-1:00 PM and 2:00 PM-6:00 PM · storytelling nap around an artwork Saturday 4:00 PM, ages 6+, booking required
• Historical and Archaeological Society of Pontoise, 43 rue Roche · exhibition "Drôles de pierres : les mégalithes dévoilent leurs mystères !" by the Departmental Archaeology Service, Saturday 2:00 PM-7:00 PM, Sunday 10:00 AM-7:00 PM
• Saint-Martin Free Commune Vineyard, 24 chaussée Jules-César · tour and tasting of the 2025 "ginglet" vintage Sunday 10:00 AM-6:00 PM, adults only
• Tour of Pontoise city center, departs from 15 rue Thiers · guided tour "Par les vivants", focusing on four Jewish families from Pontoise persecuted during WWII, Saturday 3:30 PM

Argenteuil, for the centenary of Claude Monet's death

• Impressionist House, 21 boulevard Karl-Marx · self-guided tour Saturday and Sunday 11:00 AM-7:00 PM · "Chacun sa toile !" workshop by the Musée d'Orsay, 2:00 PM-6:00 PM both days · 19th-century style traveling photographer in the garden, Saturday 2:00 PM-6:00 PM · olfactory tour with Givaudan, featuring five scents developed from Monet's works, Saturday 6:30 PM, booking required · theatrical walks "En promenade avec Claude Monet à Argenteuil" by Cie Touches d'Histoire, Sunday 2:00 PM and 4:30 PM, booking required
• L'Atelier, Abbey Gardens, 19 rue Notre-Dame · exhibition "Seine de vie, de Paris à l'Estuaire" self-guided tour Saturday and Sunday 11:00 AM-6:00 PM, guided tours at 2:00 PM and 5:00 PM both days · candlelight concert by Les Quatre Volutes, featuring Chabrier, Debussy, Ravel, and Fauré, Saturday 8:30 PM · guided tour "Argenteuil rétro" Saturday 4:00 PM · tour "L'ancienne abbaye d'Argenteuil" Sunday 4:00 PM · escape game "Qui a volé la Sainte-Tunique ?" Sunday 6:30 PM, ages 10+, booking required · improvisation show by Compagnie Adriel Sunday 3:00 PM and 5:00 PM · "À table !" workshop 2:00 PM-6:00 PM
• Saint-Denys Basilica · guided tour of the neo-Romanesque building and its stained glass by Max Ingrand and Jean Barillet, Sunday 2:15 PM · commented walk "Sur la trace des gardes suisses à Argenteuil" Saturday 2:30 PM · walk "Un itinéraire spirituel et historique en centre-ville", 2 km, Sunday 3:30 PM
• City Hall, 12-14 boulevard Léon-Feix · commented electric train tour following Monet's footsteps, Saturday and Sunday 2:00 PM-6:00 PM, departs every hour, last departure at 5:00 PM · electric bike street art tour Saturday 3:00 PM and Sunday 11:00 AM, booking required
• La Cave, 107 rue Paul-Vaillant-Couturier · urban escape game "Trace ta ville 2" Saturday 11:00 AM-6:00 PM, booking required · virtual reality experience "Claude Monet, l'obsession des Nymphéas", co-produced by the Musée d'Orsay and the Orangerie, Saturday 2:00 PM-6:30 PM · "Voyage au centre de la mandoline" with Flavien Soyer and Florentino Calvo, from Les Pincées Musicales and the Estudiantina d'Argenteuil, Sunday 2:30 PM
• Municipal Archives and Elsa-Triolet Library, 14 boulevard Léon-Feix · "Les Archives se dévoilent", Saturday and Sunday 2:00 PM-6:00 PM, with guided tours at 3:00 PM and 5:00 PM · calligraphy workshop with Éric Montigny, embroidery workshop with Sylvie Breton, and tasting workshop, 2:00 PM-6:00 PM both days
• L'Imagerie, 10 rue du 8-Mai-1945 · "La magie du cyanotype : créez votre portrait!", studio shoot followed by cyanotype printing, Saturday and Sunday 2:00 PM-6:00 PM, booking required
• Historical and Archaeological Society of Argenteuil and Parisis, 12 rue Grégoire-Collas · amateur photography exhibition on the city center renovation in the 1980s, Saturday and Sunday 2:00 PM-5:30 PM
• Train station forecourt · guided tour of the panel trail inaugurated for these Days, showing the exact spots where Monet painted, Saturday and Sunday 11:00 AM-12:30 PM
• Place Aristide-Briand · discovery rally of the Boucle Nord de Seine area, on foot or by bike, Saturday 2:00 PM, booking required

Auvers-sur-Oise

• Maison du docteur Gachet, 78 rue du Docteur-Gachet · self-guided tour with visitor journal or audio guide, Saturday and Sunday 10:30 AM-6:00 PM · guided tours "Van Gogh chez le docteur Gachet", approx. 1 hour, Saturday 11:00 AM, 2:00 PM, and 5:00 PM, Sunday 11:00 AM, 2:00 PM, 3:00 PM, and 4:00 PM · cyanotype workshop Saturday and Sunday 10:30 AM-12:00 PM · Japanese woodblock printing (mokuhanga) workshop Saturday 3:00 PM-5:00 PM, ages 7+, 16 spots
• Château d'Auvers, rue de Léry · exhibition "Van Gogh influenceur, héritages en mouvement" free access Saturday and Sunday 10:00 AM-5:00 PM, booking required
• Auberge Ravoux – Van Gogh House, 52 rue du Général-de-Gaulle · 30-minute guided tours Saturday and Sunday 12:00 PM-6:30 PM · €10 full price, €8 reduced price, free for children under 12, booking required
• Maison de l'Isle, rue Marcel-Martin · the Daubigny Museum, closed for expansion, presents its collections here: self-guided tour Saturday and Sunday 10:30 AM-5:30 PM · guided tour "Daubigny et ses élèves" Saturday 11:00 AM · "Van Gogh, fan de Daubigny" Sunday 11:00 AM · mini-concert by pianist Suhno Lee in dialogue with Daubigny's works, Saturday 4:00 PM, 30 min, booking required
• Daubigny's House-Studio, 61 rue Daubigny · Saturday and Sunday 10:30 AM-6:30 PM, special Heritage Days rate
• Absinthe Museum, 44 rue Alphonse-Callé · theatrical tour "Théo ou Vincent van Gogh au musée de l'absinthe" Saturday and Sunday 11:00 AM-1:30 PM · thematic tour "L'absinthe dans la culture populaire : cinéma, séries et chansons" Sunday 2:30 PM · booking required
• LabMusée Art Center, 23 rue du Pois · "Restaurer, c'est raviver": exhibition trail, sculpture garden, and Labcafé, Saturday 2:00 PM-6:00 PM and Sunday 10:00 AM-6:00 PM · guided tours Saturday 2:00 PM and 3:45 PM, Sunday 10:30 AM and 2:00 PM · "Paroles de restaurateur" meetings with artist Alixe Fu Saturday 2:45 PM and 4:30 PM, Sunday 11:30 AM and 3:30 PM · booking required
• Van Gogh Academy – Galerie de la Vallée de l'Oise, 1 rue François-Mitterrand · exhibition "Le dernier ami de Vincent : Paul Van Ryssel (le docteur Gachet)", paintings, engravings, and drawings, Saturday 2:00 PM-6:00 PM and Sunday 2:00 PM-5:30 PM
• La Maison Rose de Wallerand, 59 rue Daubigny · "Le temps d'un café chez les Tagliana", about the art space run by Micheline and Roger Tagliana at the Van Gogh café from 1952 to 1986, Saturday and Sunday 11:00 AM-6:00 PM
• Tourist Office, 38 rue du Général-de-Gaulle · guided tour "Sur les pas de Van Gogh" Saturday 3:00 PM-5:00 PM · tour "180 ans de la gare d'Auvers" Sunday 11:00 AM-12:30 PM · free, booking required

Beaumont-sur-Oise

• Feudal Castle, impasse de l'Esplanade · tour of the castle, from Gallo-Roman origins to the excavations of the 1980s and 1990s, Saturday 3:00 PM-5:00 PM, Sunday 10:00 AM-12:00 PM and 2:00 PM-6:00 PM · trail "Hommes, femmes et enfants résistants à Beaumont-sur-Oise", ten memorial stops for 18 names, Saturday 10:30 AM · "Beaumont à travers les âges" Sunday 10:30 AM · "Enquête à Beaumont" Sunday 3:30 PM
• Hôtel du Croissant, 2 rue Basse-de-la-Vallée · 17th-century private mansion turned into the House of Arts and Heritage, Saturday and Sunday 10:00 AM-6:00 PM · exhibition "40 ans du Service départemental archéologique du Val-d'Oise", never-before-seen objects from the castle excavations conducted from 1983 to 1991 · tour of the 16th-century cellar and tasting of Beaumont wine with the Amis de Beaumont, 2:00 PM-6:00 PM
• Beaumont-Palace Cinema, 6 avenue Anatole-France · tour of the projection booth and discovery of 35mm film, Saturday and Sunday 10:00 AM-12:00 PM, limited spots, booking required · workshop "Jeux d'optique et origine du cinéma" with the Balbu-ciné box, 10:00 AM-12:00 PM both days · continuous screening of the amateur film "La plage de Beaumont", shot in the 1930s · documentary on the history of the Palace directed by Thomas Edmond, Saturday 6:00 PM
• Saint-Laurent Church · climb the bell tower, open to the public only during Heritage Days, Sunday 2:00 PM-6:00 PM · self-guided tour commented by members of the Cercle beaumontois du Patrimoine, Sunday 2:00 PM-6:00 PM
• Évariste-Galois High School, 14 boulevard Léon-Blum · tour of the Gallo-Roman amphitheater, now located within the high school grounds, Saturday 10:00 AM-12:00 PM and 2:00 PM-4:00 PM
• Jeanne d'Arc Institution, 14 rue Alsace-Lorraine · tour of the chapel, Saturday and Sunday 2:00 PM-6:00 PM
• Pauline-Kergomard School, 14 rue de Paris · museum room, writing with quill and ink, Saturday 2:00 PM-5:00 PM
• Banque de France, 16 rue Nationale · tour of artist Ghass's studio, Sunday 10:00 AM-12:00 PM and 2:00 PM-5:00 PM

The Seine Loop: Vétheuil, Haute-Isle, La Roche-Guyon, Chérence

• Claude-Monet House, 16 avenue Claude-Monet, Vétheuil · the house where Monet lived from 1878 to 1881 opens its ground floor for the centenary of his passing, Saturday and Sunday 9:00 AM-5:30 PM · trail "Dans l'univers de Monet d'hier à aujourd'hui : liens, matières et savoir-faire", with about fifteen local artisans, 10:00 AM-6:00 PM
• Notre-Dame Church of Vétheuil, painted by Monet · guided tours Saturday and Sunday 9:00 AM-6:00 PM
• Vétheuil Artisan Workshops · Colette workshop, fashion engraving exhibition, 10:00 AM-5:00 PM both days · weaving workshop on a 1956 cast-iron loom, 10:00 AM-7:00 PM · Sophie Dupeyrat workshop-gallery, 10:00 AM-6:00 PM
• Vétheuil Rural Hall · lecture "Claude Monet et la mode au temps des impressionnistes" Sunday 3:30 PM and 4:00 PM · demonstration of antique book restoration
• Ferry Landing, Vétheuil · mini-lecture "Monet à Vétheuil 1878-1881" by guide Claire Vincent, aboard the river ferry, commented 15-minute crossing, Saturday and Sunday 10:00 AM
• Troglodytic Church of the Annunciation, 113 route de la Vallée, Haute-Isle · the only troglodytic church in the Île-de-France region, carved into the chalk cliff in the 17th century, Saturday and Sunday 10:00 AM-6:00 PM · photography exhibition on the behind-the-scenes of the filming of "Bonnard, Pierre et Marthe", in Haute-Isle, La Roche-Guyon, and Vétheuil · lecture "La vie d'un photographe" by portraitist Guy Vivien, 11:15 AM both days · "L'invention de la photographie" Saturday 10:30 AM and 2:30 PM, Sunday 11:00 AM · meeting on the beginnings of photography, from Niépce to Daguerre, 10:15 AM both days
• Haute-Isle Municipal Orchard · exhibition "Les nymphéas sur les traces de Monet" by Vincent Heguy, Saturday and Sunday 10:00 AM-6:00 PM
• Champ Monet, chemin de l'Abbaye, Haute-Isle · screening of the film "Bonnard, Pierre et Marthe" by Martin Provost, Saturday 7:00 PM
• Château de La Roche-Guyon · commented tours on WWII all day, Saturday and Sunday 10:00 AM-6:00 PM, with actors from the Pact en Vexin association · sound and visual installation "Les voix des casemates, 1944" by Tomasz Namerła, in the casemates used in 1944 by Erwin Rommel's staff
• Le Jardin de Claire-Lise, rue du Quai, La Roche-Guyon · painting, sculpture, and ceramics by Claire-Lise Champarnaud, Jung Shen, and Loren Batt, Saturday and Sunday 10:00 AM-6:00 PM
• La Roche-Guyon Town Hall · techniques and processes for restoring old films and photos, Saturday 3:30 PM, 40 spots
• Chérence · commented hike "Chérence, histoire de pierre", on the limestone quarries of the plateau, Saturday 2:30 PM · Saint-Denis Church, Romanesque nave from the late 11th century and 16th-century ensemble, Saturday and Sunday 2:00 PM-6:00 PM, with an exhibition on painter Marie-Thérèse Dethan-Roullet (1870-1945)

Cergy-Pontoise and the Oise Valley

• Maubuisson Abbey, avenue Richard-de-Tour, Saint-Ouen-l'Aumône · historical guided tour Saturday and Sunday 11:00 AM and 3:00 PM, booking required · unusual cellar tour "Vingt mille lieux sous l'abbaye" at 2:00 PM and 5:00 PM both days, booking required, not accessible to people with reduced mobility · "La grange en lumière" with artist Hugo Béhérégaray, in the exceptionally opened barn, 2:00 PM-6:00 PM · metal embossing workshop "L'abbaye embrochée" 2:00 PM-6:00 PM · inauguration of the photo exhibition "Regards sur Maubuisson", fifteen images created by Marie Ménestrier and Marie-Hélène Peltier, Saturday 2:30 PM · concert "Amore Toscano" with the Il Graviglio ensemble and Marco Angioloni, Val d'Oise Baroque program, Sunday 4:00 PM
• Saint-Ouen-l'Aumône Town Hall · storytelling walk about the city's personalities, with an actor from the Théâtre Uvol, Saturday 2:00 PM-4:30 PM
• Château de Grouchy, 14 rue William-Thornley, Osny · exhibition "William Thornley : les secrets de son atelier", early watercolors, youth drawings, and never-before-seen lithographs, Saturday and Sunday 2:00 PM-6:00 PM · Corinne Poplimont exhibition 2:00 PM-6:00 PM · family investigation game "Vol au château de Busagny" 2:00 PM-5:00 PM both days · open house of the Petit-Robinson vineyard cellar and tasting of the 2025 vintage, 3:00 PM-6:00 PM · Saint-Pierre-aux-Liens church open 2:00 PM-6:00 PM · watercolor workshop with Corinne Poplimont Sunday 3:00 PM, booking required · show "Chapeau, Perrault !" by the Théâtre en Stock company, Sunday 4:00 PM
• Val-d'Oise Departmental Firefighters Museum, 14 rue William-Thornley, Osny · Saturday and Sunday 10:00 AM-6:00 PM, with a parade in the park and concert by two brass bands, volunteer group stand, and drone demonstration
• Cerclades University Library, place des Cerclades, Cergy · exhibition of the university's heritage collections and exceptional opening of the reserve, Saturday 10:00 AM-5:00 PM
• La cour des arts, 8 rue Nationale, Vauréal · market of ceramicists and artisans, demonstrations, and on-site catering, Saturday and Sunday 10:00 AM-6:00 PM · at the ZIGZAG gallery, exhibition "Faune et Flore" with La Source Garouste-Villarceaux
• Vauréal, rue Amédée-de-Caix-de-Saint-Aymour · historical walk around the village's three listed monuments: Notre-Dame-de-l'Assomption church, the cemetery cross, and the covered alley, Sunday 2:30 PM
• Notre-Dame-de-la-Nativité Church, 33 rue Gabriel-Lainé, Jouy-le-Moutier · concert by the Anidrà duo, handpan and esraj, with Maurice Spitz and Frédéric Perroux, Saturday 6:00 PM, booking required

The French Vexin

• Departmental Archaeological Museum, 4 place du Château, Guiry-en-Vexin · historical reenactment "À la rencontre des Mérovingiens", camp, costumes, and jewelry, Saturday and Sunday 1:00 PM-6:00 PM · exhibition "Le monde de Clovis" in flash tours 2:00 PM-4:20 PM · escape game "À la recherche de la tombe mérovingienne" 2:00 PM-4:45 PM
• French Vexin Museum, 2 rue Achim-d'Abos, Théméricourt · interactive exhibition Archi'Vexin on Vexin architecture, Saturday 9:30 AM-12:30 PM and 2:00 PM-6:00 PM, Sunday 10:00 AM-6:00 PM · 30-minute express tours Sunday 2:30 PM, 3:30 PM, and 4:30 PM · lecture "Étonnantes maisons et belles demeures du Vexin français" with Marianne Metais and Luc-Olivier Baschet, Sunday 2:00 PM, booking required
• Tool Museum, rue de la Mairie, Wy-dit-Joli-Village · commented tour of Claude Pigeard's forge, tool collections, remains of Gallo-Roman baths, and medieval-inspired garden, Saturday and Sunday 2:30 PM, booking required · wood carving demonstration by Jonathan Bernard and presentation of a collective creation led with Vexin children, 1:00 PM-6:00 PM both days
• Domaine de Villarceaux, route de Villers, Chaussy · commented tour "Villarceaux, des origines au Grand Siècle" Saturday and Sunday 2:00 PM and 4:00 PM · tour "Du siècle des Lumières à aujourd'hui", Upper Castle and three centuries of gardens, Saturday and Sunday 2:30 PM and 4:30 PM · booking required
• Saint-Crépin-et-Saint-Crépinien Church, Chaussy · first public opening, with presentation of liturgical objects, Saturday and Sunday 3:00 PM-5:00 PM
• Château de Vigny, 1 rue Beaudoin · lecture "Le château de Vigny à travers les âges", from its construction in the 16th century to the preservation campaigns of the last decade, Saturday 10:00 AM-6:00 PM, booking required
• Saint-Sulpice Church, Chars · self-guided tour Saturday and Sunday 10:00 AM-12:00 PM and 2:00 PM-5:00 PM, with an exhibition on the work carried out in the 19th and 20th centuries and future projects · guided tours of the Romanesque capitals, Gothic nave, and Renaissance bell tower, Saturday 10:00 AM, 3:00 PM, and 5:00 PM, Sunday 3:00 PM
• Notre-Dame Church, Épiais-Rhus · exhibition "Notre-Dame d'Épiais-Rhus mise en lumière", Renaissance building erected between 1570 and 1590 and listed since 1911, self-guided tour Saturday and Sunday 10:00 AM-6:00 PM, guided tours 2:30 PM and 4:00 PM · vintage car gathering
• Arnaud Kasper Sculpture Park – le Bois des arts, 2 sente du Moulin, Épiais-Rhus · Saturday and Sunday 2:30 PM-6:30 PM
• Notre-Dame Church, Magny-en-Vexin · presentation by Nicolas Laplane of his thesis on religious life in Magny-en-Vexin in the 18th century, followed by a discussion, Sunday 4:00 PM
• Saint-Gervais-et-Saint-Protais Church, Saint-Gervais · guided tours with musical entertainment, sacristy with listed woodwork open, Saturday and Sunday 2:30 PM-5:00 PM
• Saint-Clair Church, Hérouville-en-Vexin · exhibition on the 2003 archaeological excavations conducted in the church, Saturday and Sunday 2:00 PM-6:00 PM
• Jardins de Campagne, 13 rue de Butel, Grisy-les-Plâtres · garden labeled "Jardin remarquable", self-guided tour Saturday 10:00 AM-6:00 PM
• Old Town Hall, 13 rue Jules-Ferry, Saint-Clair-sur-Epte · collaborative photography exhibition "Du haut de ce clocher 1000 ans d'histoire vous contemple…", contributed by residents, Saturday and Sunday 10:00 AM-6:00 PM
• Pontoise Airfield – Cormeilles-en-Vexin · open house, aircraft exhibition, and meeting with airport stakeholders, Sunday 10:00 AM-5:00 PM

Montmorency Valley and Parisis Hillsides

• National Museum of the Renaissance, Château d'Écouen · free self-guided tour Saturday and Sunday 9:30 AM-12:45 PM and 2:00 PM-5:30 PM · new exhibition "Couronner le ciel, épis de faîtage et décors de toiture", 9:30 AM-12:30 PM and 2:00 PM-5:30 PM · presentations "Du chantier à l'exposition", where the scientific team shares discoveries from three years of restoration, Saturday 2:00 PM, 3:00 PM, and 4:00 PM, Sunday 2:15 PM and 3:30 PM · theatrical tour "À la recherche de Madame Campan", in seven stages in the gardens, Sunday 3:00 PM, booking required
• Jean-Jacques-Rousseau Museum, 5 rue Jean-Jacques-Rousseau, Montmorency · guided tour of the house where Rousseau lived from 1757 to 1762, Saturday and Sunday 2:00 PM-6:00 PM · exhibition "Impitoyables Lumières ! Amitiés et rivalités au temps de Jean-Jacques Rousseau" · exhibition "Jean-Jacques en son cœur" by sculptor Marie Busson · quill, ink, and wax seal workshop, 2:00 PM-6:00 PM
• Fort de Cormeilles-en-Parisis, 1 route stratégique · Sunday 9:00 AM-5:00 PM: group guided tours, Fort museum in three rooms covering the period from 1870 to the present day, historical bread ovens with on-site baking, model of the 155 De Bange cannon, and reenactors in period attire
• L'Empreinte, 31 rue Thibault-Chabrand, Cormeilles-en-Parisis · exhibition "Fan de Daguerre ! Cormeilles célèbre son photographe", in the birthplace of Louis Daguerre, with daguerreotypes and immersive film, Saturday 10:00 AM-1:00 PM and 2:00 PM-6:00 PM, Sunday 2:00 PM-6:00 PM · guided tours Saturday 11:00 AM and 3:00 PM · workshop "Fabrique ton cadre à daguerréotype" Saturday 2:00 PM-5:00 PM · meeting with Stéphane Belzère, creator of the diorama, Sunday 6:00 PM, booking required
• Chenêt Washhouse, place Cauchoix, Cormeilles-en-Parisis · guided tours of the recently renovated washhouse and its dome, Sunday 2:30 PM, 3:30 PM, and 4:30 PM, booking required
• Sannois Windmill, 26 rue des Moulins · guided tours of the pivot windmill built in 1759, the last of its kind still in working order in the Île-de-France region, Saturday and Sunday 2:00 PM-7:00 PM
• Taverny · guided walk of Notre-Dame church, from the altarpiece to the attic and organ, by art historian Laure Gauffre, Saturday 10:00 AM-12:30 PM · tour of the Madeleine-Renaud theater and its recording studios, Saturday 10:00 AM and 11:00 AM, two 45-minute sessions, booking required · open-air exhibition "Taverny remonte le temps", to be followed at the exact locations of old photographs, Saturday and Sunday · exhibition "Taverny à travers les cartes postales anciennes" at the SNCF train station, platform towards Paris, Saturday and Sunday 6:30 AM-8:30 PM · Gallo-Roman artifact hunt starting from the Micro-Folie, Saturday 2:30 PM
• Compagnie d'Arc d'Ermont, 105 rue Saint-Gratien · opening of the lodge and the archery garden (beursault), as intangible cultural heritage, Saturday 10:00 AM-5:00 PM
• Buttes du Parisis Regional Natural Area, Montigny-lès-Cormeilles · walk "Empreintes du Parisis : marcher dans les traces du paysage", Saturday 10:00 AM-1:00 PM
• Les Jardins d'Arcadie Residence, 9 rue André-Nouet, Domont · tour of the rehabilitation of a 19th-century castle into a senior residence, Saturday 9:00 AM-5:00 PM
• Domaine de Montmanoir, 6 rue de Paris, Montlignon · photography trail based on old views of the estate and its buildings, Sunday 10:00 AM-6:00 PM, booking required
• Roger-Prévot Hospital, 52 rue de Paris, Moisselles · historical walk in the former asylum for the establishment's 120th anniversary, led by a history PhD student, Saturday 2:30 PM
• Saint-Brice-sous-Forêt · lecture "Cathédrale Notre-Dame de Paris : un patrimoine sauvé" by Marc Soleranski, Lionel-Terray cultural and sports center, Saturday 3:00 PM-5:00 PM, ages 15+, booking required · immersive role-playing game at the Bernard-Tronchet toy library, Saturday 2:00 PM-6:00 PM

Oise Valley, Pays de France, and Plaine de France

• Royaumont Abbey, Asnières-sur-Oise · unique tour with opening of the so-called "Saint Louis" room following the guided tour, Saturday 2:00 PM and 3:30 PM, Sunday 11:00 AM, 2:00 PM, and 3:30 PM · open libraries and lectures, including one on Debussy · €11 full price, reduced prices, booking required
• Archéa Museum, 56 rue de Paris, Louvres · guided tours of the permanent exhibition, nearly 800 archaeological objects from the Pays de France, Saturday and Sunday 11:00 AM-6:00 PM · temporary exhibition "Rouge ! Archéologie d'une couleur" · photo exhibition "Nouvelles ruralités à Louvres" by Matthias Crépel · scavenger hunt for ages 4+ · escape game "Panique à Saint-Rieul" Saturday 2:00 PM and 4:00 PM, booking required · guided tour of the Saint-Rieul tower Sunday 3:00 PM, departs from the museum
• Orville Archaeological Site, chemin d'Orville, Louvres · guided tours of the Hundred Years' War castle and early Middle Ages reconstructions, Saturday and Sunday 2:00 PM-6:00 PM · participatory workshop to build a fortified castle with over 20,000 Kapla planks, Sunday 2:00 PM-6:00 PM, ages 8+
• Ysieux Potters' Archaeological Site, Grande Rue, Fosses · tour of the ongoing site: rammed earth reception building, remains of old kilns under restoration, 17th-century farm courtyard, Saturday and Sunday 2:00 PM-6:00 PM, booking required
• Three works by Guillaume Bottazzi, rue Rosa-Parks, Fosses · enameled works installed in 2021, Saturday 9:00 AM-6:00 PM
• Cartoucherie Ecomuseum, 24 Grande Rue, Survilliers · guided tour of the ecomuseum and the workers' housing estate of the French Cartoucherie, a factory founded in 1903, Saturday and Sunday 2:30 PM-5:30 PM, booking required
• Survilliers Town Hall · exhibition "Villa Ysieux", collective creation by Antonin Heck with residents of Fosses, Marly-la-Ville, and Survilliers, Saturday 9:00 AM-12:00 PM
• La Fabrique du musée, 24 rue de Paris, Gonesse · continuous tour-workshop behind the scenes of the future museum, Saturday 5:00 PM-8:30 PM, booking required
• Place Hyacinthe-Drujon, Goussainville · guided tours of the "Vieux Pays", its centuries-old houses, and its church, with Philippe Vieillard and Jérôme Moreau, Saturday 9:30 AM, 11:00 AM, 2:00 PM, and 3:30 PM
• Sarcelles · naval museum, created by the Association of Former Sailors of Sarcelles-Garges, Saturday 2:00 PM-6:00 PM and Sunday 9:00 AM-6:00 PM · tour on the history of the Sarcelles castle, now the Simone-Veil cultural center, Saturday 2:00 PM-4:00 PM, booking required · permanent exhibition "L'histoire des grands ensembles" at the Anna-Langfus library, Saturday 10:00 AM-6:00 PM
• Château d'Arnouville, 7 rond-point de la Victoire · guided tour of the castle built from 1751 to 1757 for Jean-Baptiste de Machault, and its park, Sunday 2:00 PM and 3:30 PM, booking required
• Saint-Didier Church, 1 rue Gambetta, Villiers-le-Bel · tour of the church listed in 1931 and presentation of its 17th-century organ, Saturday 11:00 AM · concert "Seraphim in Luce", motets and arias of French Baroque for two sopranos and organ, Saturday 6:00 PM, booking required
• François-Mauriac Museum, 5 rue Léon-Bouchard, Vémars · commented tour in a room of the Château de la Motte, Saturday and Sunday 2:30 PM-6:30 PM, 15 spots
• Val'Pôle, route de Bouqueval, Le Plessis-Gassot · Saturday 9:30 AM-4:00 PM: guided tours of the waste recovery site and biodiversity tours, registration required, workshops on making objects from recycled plastic, sorting games, exhibitions on machinery and the site's biodiversity
• Louis-Senlecq Museum of Art and History, 31 Grande Rue, L'Isle-Adam · exhibition "Mémoires du paysage", engravings and drawings by Caroline Bouyer and Ariane Fruit, and family workshops, Saturday and Sunday 2:00 PM-6:00 PM
• La Plage, avenue du Général-de-Gaulle, L'Isle-Adam · guided tour on seaside tourism in the Paris region since the 1910s, Saturday 10:30 AM and 3:30 PM, 25 spots
• Viarmes, 21 rue de Paris · exhibition "Mémoire de l'eau : patrimoine hydraulique de Viarmes et Royaumont", with virtual reality headset tour, Saturday and Sunday 10:00 AM-12:00 PM and 2:00 PM-5:00 PM · harp hike-concert from the remains of the medieval castle of Viarmes to Royaumont, via the washhouses and the 13th-century Fontaine aux Moines, reopened for the occasion, Sunday 2:00 PM-5:00 PM
• Belloy-en-France, meet at place Sainte-Beuve · cultural hike on the history of the municipality, with the association Belloy-en-France autrement, Sunday 9:00 AM-1:00 PM, booking required
• Saint-Vivien Church, Bruyères-sur-Oise · exhibition of old postcards of the municipality, Saturday 2:00 PM-5:00 PM · recital "Faire résonner la pierre" by the Choristes de Studiochant and Vincent Casalta, Saturday 3:00 PM

The Chinese Pavilion of L'Isle-Adam, initially announced, is cancelled: neither the Sunday self-guided tour nor the Saturday riddle game will take place.