Heritage Days 2026 at the castles of Seine-et-Marne (77), visits on the program

What to do for the Heritage Days 2026? In the greater Paris area, a broad program of tours awaits, inviting discovery of the treasures of Île-de-France. For this 43rd edition arriving on the weekend of September 19–20, 2026, enthusiasts and curious minds have the chance to pack in cultural outings and great deals by exploring fascinating places. From must-see monuments to hidden spots, via historic gems, the big institutions or even temples of craftsmanship, the public is invited to explore the Île-de-France heritage inside and out.

And the castles won’t miss the ball. Plenty of tours await us inside these residences steeped in history. In Seine-et-Marne, besides the famous château de Fontainebleau, numerous estates and historic sites that deserve to be known invite us to this new edition of the Heritage Days.

• To be read
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We take you on a journey to discover the castles of Seine-et-Marne and the programs that await you at this not-to-be-missed cultural event in September. Stay tuned: the guide is updated as and when we make announcements and discoveries.