And we’re off again! The Heritage Days are landing in Paris and Île-de-France on the weekend of September 19-20, 2026 for a new and 43rd edition. The perfect opportunity for enthusiasts and the curious alike to make the most of a bumper program of free tours, quirky activities and exceptional openings at the heart of the treasures that make up the Île-de-France heritage.
Every year, venues of all kinds enter the dance, and it's hard not to find a program to match your passion. From must-see monuments to little-known nuggets and major institutions, we take the opportunity to explore our heritage from every angle.
And there's no shortage of châteaux to choose from. What's more, the Heritage Days are also a great opportunity to visit the treasures of the Île-de-France region. And at Essonne, you can discover the history and treasures of some of the region's most magnificent buildings through a program specially designed for the occasion. We'll take you on a tour of the castles in the 91 département that are waiting to welcome you for the Heritage Days. By the way, as this page is updated according to announcements and discoveries, please consult it regularly to discover even more ideas for outings.
Heritage Days 2026: visit the secret estate of Sillery in Essonne
Fancy a unique outing in Île-de-France for the 2026 Heritage Days? Head to Épinay-sur-Orge to discover Sillery Park and its château. [Read more]
Domaine de Montauger: Heritage Days 2026 at the heart of Essonne’s House of the Environment
Celebrate Île-de-France’s natural heritage on September 19–20, 2026 at Domaine de Montauger. Discover the history of this remarkable site in Essonne and its 15 hectares of protected spaces open to everyone. [Read more]
Shows and games at the Château de Saint-Jean de Beauregard: the Heritage Days program
On the occasion of the 43rd edition of Heritage Days, Château Saint-Jean de Beauregard invites you to join us on 19 and 20 September 2026. As part of these discovery-focused days, guided tours of the château and its gardens will be offered, along with a few surprise activities... [Read more]
This privately owned medieval castle opens its doors to visitors for Heritage Days 2026.
Situated in Essonne, the Château de Villeconin invites the public to discover the Journées du Patrimoine by revealing its treasures through a weekend program of tours on September 19 and 20, 2026. [Read more]
Special tours and a free performance at the Domaine de Chamarande for the 2026 European Heritage Days
Looking for a great family outing during the 42nd Heritage Days? Then head to the Domaine de Chamarande in Essonne to enjoy the château and its park’s special program on September 19–20, 2026. [Read more]
In Forges-les-Bains, a castle opens its doors for the 2026 Heritage Days.
This Sunday, September 20, 2026, the Château de Forges-les-Bains will welcome the public for a special open day organized for Heritage Days. Here’s the program! [Read more]
This little-known château in Essonne will open to the public on an exceptional basis for the 2026 Heritage Days.
This Sunday, September 20, 2026, the Château de Bierville will exceptionally open its doors to the public on the occasion of the European Heritage Days. A chance to discover a place steeped in nearly a thousand years of history and a unique social commitment in Île-de-France. [Read more]
European Heritage Days 2026: Tour the Château and Courances Park (91)
Looking for a Heritage Days outing in Essonne? The Château and Park of Courances, in the 91, open their doors to visitors on the weekend of September 19–20, 2026. Admission remains payable. [Read more]
Heritage Days 2026 at Montagu Castle (91), at the heart of the ruins and the Henri IV Tower: program
Heritage Days 2026 take over Château de Montagu (91). Here’s what to expect for the weekend of September 19–20, 2026. A great plan for the weekend! [Read more]
Treasure hunt and activities at Victor Hugo’s literary home for Heritage Days 2026
Victor Hugo’s literary house in Bièvres, in the Essonne department, will open its doors free of charge to the public on the weekend of September 19–20, 2026, for Heritage Days. [Read more]
Gourmet market, vintage cars and guided tours: Heritage Days 2026 at the Château de Mesnil-Voysin
The Château de Mesnil-Voysin, located in Bouray-sur-Juine, is set to welcome visitors this weekend, September 19–20, 2026, with a rich lineup prepared for Heritage Days. [Read more]
Dates and Opening Time
From September 19, 2026 to September 20, 2026
Prices
Free
