It's the not-to-be-missed event in September. On the weekend of September 20 and 21, 2025, the Journées du Patrimoine (Heritage Days) will once again take over the Paris region for a 42nd edition packed with cultural discoveries and visits. During this highlight of the Paris region calendar, the general public is invited to discover and rediscover the treasures of the Île-de-France heritage.
This event, which takes place all over Europe, is an opportunity to get the most out of a vast program of visits, often free of charge, accompanied by activities designed for young and old alike. In Paris and the Ile-de-France region, a wide range of sites are involved: museums, monuments, castles, churches, libraries and even places that are usually closed to the public, including ministries, embassies and major institutions.
Why not take advantage of this opportunity to explore the heritage of the Ile-de-France region? In the Val d'Oise region, you'll find plenty of great discoveries and cultural nuggets, and in the town of Arnouville, you'll have the opportunity to delve into thehistory of its Château, an unfinished monument built at the end of the 18th century for Jean-Baptiste de Machault d'Arnouville, minister to Louis XV.
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
Dates and Opening Time
From September 20, 2025 to September 21, 2025
Location
Chateau d'Arnouville
7 Rond Point de la Victoire
95400 Arnouville les Gonesse
Official website
arnouville95.fr
