Dive into the atmosphere of Halloween at the heart of the Yvelines Departmental Archives, where you can scare yourself and your family for free, while discovering the history of the department and its premises. From October 21 to 31, 2025, the corridors of the Archives will seem haunted, thanks to a wide range of activities, including escape games, fun workshops and theatrical tours. Most of these can be booked in advance, or on on the day itself, subject to availability.
Unlock the secrets of the past buried in dusty old vaults, and discover some of the department's best-known tales, during the day or in the evening, at Montigny-le-Bretonneux!
Follow the guide for an unexpected visit to the Archives! An archivist will take you into the world of archives and the oldest documents kept in areas usually off-limits to the public. But will everything really go according to plan?
A mystery hangs in the air. Henri Désiré Landru is said to have hidden the spoils of his crimes. Where? Nobody knows. But clues remain... It's up to you to find them. Leaf through the archives, follow the leads, decipher the riddles. Step by step, you'll get closer to the truth. But beware: only a perceptive, observant and methodical investigator will be able to discover the exact location where Landru hid his treasure...
At the Archives, a workshop other than the goblins' comes to life: it's the goblins' workshop as they prepare for Halloween. Paper pumpkins, illuminated grimoires... And are you ready?
The dead speak to the living! If you'd like to find out about the lost souls lurking in our archives or library, take a message from the Pot des âmes perdues. Whether it's a news item, a criminal case, a revolution or a war, discover the destinies of those who made history, big and small, from Seine-et-Oise to Yvelines.
Halloween 2025 in Yvelines: terrifying events and activities to discover in the 78
Between autumn traditions and family thrills, Halloween 2025 in Yvelines promises to be one of the season's must-see events. Around October 31, the 78 transforms: decorated villages, glowing pumpkins, scary costumes, and terrifying events enliven the entire department to celebrate Halloween in an atmosphere that is as festive as it is mysterious. [Read more]
Halloween 2025 is also coming to the museums and castles of Paris and Île-de-France! Themed workshops, night tours, family games, and costume parties await young and old alike to celebrate the most mysterious holiday of the year in the heart of the Île-de-France region's heritage. [Read more]
Dates and Opening Time
From October 21, 2025 to October 31, 2025
Location
Archives départementales des Yvelines
2 Avenue de Lunca
78180 Montigny le Bretonneux
Prices
Free
Official website
archives.yvelines.fr
Halloween 2025 in Yvelines: terrifying events and activities to discover in the 78
Halloween 2025 in Paris and Île-de-France: events in museums and castles
