Heritage Days 2025 in Paris: visit the Ministry of Overseas France, in the Hôtel de Montmorin

The biggest event of the autumn season returns on September 20 and 21, 2025: get ready for another edition of the Journées du Patrimoine in Paris! As every year, this major cultural event takes over the capital for a weekend full of discoveries and surprises.

The Journées du Patrimoine give everyone the chance to visit fascinating, mysterious or unusual places. From behind the scenes at the RATP to the Museum of the History of Medicine, from the Printemps department stores to the Grand Rex and Parisian cemeteries, thousands of sites open their doors to curious visitors of all kinds.

• To be read
• This week's top picks in Paris and Île-de-France, September 7–13, 2026

But the main attraction of the Journées du Patrimoine is access to places that are usually closed to the public. During this September weekend, you can visit ministries such as the Ministry of Education, the Ministry of the Armed Forces, the Ministry of the Interior... And the Ministry of Overseas France.

Housed in theHôtel de Montmorin, a private mansion that has seen several lives since the 18th century, the Ministry of Overseas France is responsible for supporting the 12 territories located far from mainland France, in the Indian, Pacific, Atlantic and Antarctic oceans. It promises to be an interesting visit, but please note that reservations are required.

On the programme for the Heritage Days at the Ministry of Overseas France:

Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.

For more visits and discoveries of French institutions, consult our guide.

Heritage Days 2026 in Paris: visit the ministries during exceptional open-door events.
Attention politics enthusiasts... Heritage Days are the opportunity to uncover the inner workings of power, and for the 43rd edition taking place the weekend of September 19–20, 2026, you have the chance to visit the various ministries nestled in the heart of the capital. The best way to explore the premises where ministers work, to fully understand how the government operates! [Read more]