Heritage Days 2025: the program at the Maison de Fer de Poissy (78)

Published by Margot de Sortiraparis, Rizhlaine de Sortiraparis · Photos by My de Sortiraparis · Updated on October 3, 2025 at 03:16 p.m. · Published on August 23, 2024 at 03:51 p.m.
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.

Created in 1984 by the French Ministry of Culture, the Journées du Patrimoine (Heritage Days) have become a not-to-be-missed event for history and culture lovers in France. This annual event, usually held on the third weekend in September, gives the public almost exclusive access to historic monuments, museums, châteaux and even places usually closed to the public. In Paris, this event is a unique opportunity to discover the capital's rich architectural, artistic and cultural heritage.

In 2024, the Journées du Patrimoine will take place on September 20 and 21, with an exceptional program. In Paris and the Île-de-France region, emblematic sites such as the Palais de l'Elysée, theOpéra Garnier and the Panthéon will be opening their doors. Numerous guided tours, temporary exhibitions and workshops for young and old will be on offer throughout this major cultural weekend.

The Maison de Fer de Poissy, built at the end of the 19th century, is a one-of-a-kind structure. Made of metal, it is the fruit of the ingenuity ofengineer Joseph Danly, who sought to demonstrate the advantages of iron in construction. A testament to an era when metal embodied modernity and innovation, the house is now a historic monument. During the Journées du Patrimoine, you can discover its atypical architecture, its fascinating history, and the initiatives put in place to preserve it. A not-to-be-missed visit for architecture and industrial history enthusiasts.

On the program for the Journées du patrimoine 2025 at the Maison de fer in Poissy (78):

  • Flash visit
    Saturday, September 20, 2025 - 10:00 ⤏ 18:00 | Sunday, September 21, 2025 - 13:00 ⤏ 18:00

    Maison de Fer staff will be on hand throughout the day to guide you through the exhibition Poissy grandeur nature and the collections on display, and to share their insights with you on flash visits. A great opportunity to learn more about the Maison de Fer and Poissy's natural heritage!

    Free admission



  • Self-guided tour, "Poissy, grandeur nature".
    Saturday, September 20, 2025 - 10:00 ⤏ 18:00 | Sunday, September 21, 2025 - 13:00 ⤏ 18:00

    Take advantage of this exceptional day to (re)discover "Poissy grandeur nature".

    Free admission



  • The Meccano™ Iron House
    Saturday, September 20, 2025 - 10:30 ⤏ 12:30

    The Iron House invites you to come and discover its history and unique architecture before embarking on the construction of a scale model imagined by the famous Meccano™ toy brand.



  • The Poissy mystery
    Saturday, September 20, 2025 - 15:00 ⤏ 18:00

    A crime has just been committed in one of Poissy's monuments. Come and unmask the culprit! Unleash your detective skills and solve the case just like in the famous detective game. An original way to (re)discover the finest treasures of Poissy's heritage and the historical figures associated with the town!

    In partnership with Ludothèque Mobile de Poissy



  • Screening of the film "Faire chemin
    sunday, september 21, 2025 - 13:00 ⤏ 18:00

    Over the course of 2022-2023, students from several classes at the Lycée Adrienne Bolland used walking, silver photography and writing to compile an inventory of everyday life. From the rails of the former "grande ceinture" to the collegiate church, from the state forest to the foot of the car factory, from the Saint-Exupéry district to the Rouget-de-l'Isle district under construction, from the banks of the Seine to the outskirts of the A14 freeway, their work constitutes a sensitive archive of a city in transformation. Come and discover a variety of perspectives on a common territory: Poissy.



Practical information

Dates and Opening Time
From September 20, 2025 to September 21, 2025

× Approximate opening times: to confirm opening times, please contact the establishment.

    Location

    2 Allée des Glaieuls
    78300 Poissy

    Route planner

    Official website
    www.ville-poissy.fr

    Comments