The Journées du Patrimoine (Heritage Days) take place every year at in September , offering a fabulous weekend of cultural discoveries. During this not-to-be-missed event, visitors to museums, monuments, castles, churches, institutions and other places usually closed to the public can enjoy a wide range of activities. A program of events, often free of charge, awaits young and old alike during this exceptional weekend. Want to make the most of it? Don't miss the date of the 42nd edition, scheduled for September 20 and 21, 2025.
It's an opportunity to explore the heritage of the Île-de-France region, particularly in Essonne. And in the town of Saclay, a number of programs await us to discover the treasures of this commune in the 91 region. Located south-west of Paris, Saclay is home to a number of scientific research institutions and grandes écoles, as well as several historic monuments. This is your chance to discover the heritage of this town, at the crossroads of history and science, during the Journées du Patrimoine. We'd like to share this year's program with you!
Château de la Martinière
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Saint-Germain Church
Self-guided tour of Saclay Saint-Germain church. 12th-century church. Possibility of visiting the bell tower.
Villeras Fort
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Ornithological Observatory
Discover the ornithological treasures of Saclay's ponds.
Located on the north shore of the Etang Vieux, the ornithological observatory is a large "nest" on stilts emerging from the reed beds. The Saclay ponds, classified as a Conventional Nature Reserve (RNC), are home to both migratory and breeding birds.
Guided tour by ADER.
Dates and Opening Time
From September 20, 2025 to September 21, 2025
Location
Saclay
saclay
91400 Saclay
Official website
www.saclay.fr
