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.
