Heritage Days 2025 in Poissy (78): discover the treasures of this fascinating Yvelines commune

Embark on a historic journey through Poissy during the Journées du Patrimoine 2025! On September 20 and 21, explore the town free of charge, from the birthplace of Saint Louis to modern industry. We take a look at what's in store for you!

The long-awaited annual " Journées du Patrimoine" (Heritage Days) are back in 2025 to help you discover the wonders of France's heritage! Over the weekend of September 20 and 21, thousands of sites all over France open their doors free of charge. In Poissy, once again this year, it's a chance to immerse yourself in history, with guided tours, exhibitions and events for the whole family. Experience history like never before!

Located in the Yvelines department, Poissy is a town with a thousand years of history. Known as the birthplace of Saint Louis, born at the Château de Poissy in 1214, it is also renowned for the Collégiale Notre-Dame, a jewel of Gothic architecture. Don't miss a visit to the Villa Savoye, designed by architect Le Corbusier and now aUNESCO World Heritage Site. Poissy is a vibrant testimony to French history, from the Middle Ages to 20th-century modernism.

There's nothing like the Journées du Patrimoine (Heritage Days ) to explore Poissy from a whole new angle! Stroll through the streets of the old town and be amazed by its half-timbered houses and picturesque alleyways. The Poissy Heritage Days are an invitation to marvel... It's an opportunity to rediscover an authentic city and share a unique cultural moment with family and friends!

The program for the Journées du Patrimoine 2025 in Poissy :

Heritage Days 2025 at the Musée du Jouet (78): fun family visits
Fall back into childhood on September 20 and 21, 2025, with the Musée du Jouet's family program for the 42nd Heritage Days. [Read more]

Heritage Days 2025 at the Villa Savoye (78): drawing competition and free tour
The Villa Savoye opens its doors to us free of charge on September 20 and 21, 2025, to mark the Journées du Patrimoine. Discover the weekend program. [Read more]

Heritage Days 2025: the program at the Maison de Fer de Poissy (78)
What to do for the Journées du Patrimoine 2025 in Yvelines? In Poissy, you can (re)discover the Maison de Fer on the weekend of September 20 and 21, 2025. Discover this astonishing, one-of-a-kind building, whose visit should delight lovers of architectural nuggets. [Read more]