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]
Heritage Days 2026: discover the Montauger estate and its nature reserve
For Heritage Days 2026, head to the Domaine de Montauger in Essonne to explore. Between a restored château, preserved marshes and educational trails, enjoy a free nature outing on 19 and 20 September 2026. [Read more]
Heritage Days 2026: Explore the Castle of Saint-Jean de Beauregard (91)
On the occasion of the 43rd edition of Heritage Days, Château Saint-Jean de Beauregard welcomes you on Saturday, September 19 and Sunday, September 20, 2026. The lineup for these special days includes guided tours of the castle and its gardens. [Read more]
Explore this privately owned medieval castle during Heritage Days 2026.
The Château de Villeconin, in Essonne, invites you to celebrate Heritage Days by showcasing its treasures through a weekend of guided tours scheduled for September 19–20, 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]
Heritage Days 2026 at Victor Hugo's Literary House: weekend program
Victor Hugo’s literary house in Bièvres, Essonne, will open its doors to the public free of charge on September 19 and 20, 2026, to mark the new edition of the Journées du Patrimoine (Heritage Days). [Read more]
Heritage Days 2026 at Mesnil-Voysin Castle: the schedule of activities
The Château de Mesnil-Voysin, located in Bouray-sur-Juine, is set to welcome visitors this weekend, September 19–20, 2026, as it celebrates the new edition of Heritage Days. [Read more]
Dates and Opening Time
From September 19, 2026 to September 20, 2026
Prices
Free
