To enjoy the Journées du Patrimoine, you don't need to face the crowds or get lost in the heart of Paris: many exceptional venues are right on your doorstep, waiting for your visit! Proof: on Saturday, September 19 and Sunday, September 20, 2026, drop by the charming town of Ormesson-sur-Marne. The Château d'Ormesson is opening its doors to us for a special weekend.
During these two days in September, the d'Ormesson family invites us to visit their family château, built in 1530 by Jacques Androuet du Cerceau for Olivier d'Ormesson, Judge-Rapporteur at Fouquet's trial.
Some of the world's greatest authors, parliamentarians, diplomats and academics have lived here: Diderot, Marshal Lyautey, Madame de Sévigné, His Majesty King Mohamed V of Morocco, Count Wladimir d'Ormesson, Ambassador to the Holy See... Five centuries of history are still visible within the walls of this building.
Literature, history, art and nature intermingle in this château set in 130 hectares of parkland. Come and admire this well-preserved historic estate, and let yourself be seduced by its beauty.
Guided tours of the Château d'Ormesson
The Château d'Ormesson, a historic estate held by the same family since 1630, opens to the public in 2026, including during the Journées du Patrimoine (Heritage Days).
Guided tours through the park’s basins and the château’s principal reception rooms (which retain furniture untouched for more than a century) invite visitors to discover this literary landmark, today home to France’s largest private archival collection.
Initially attributed to Jacques and then to Baptiste Androuet du Cerceau, the building dates back to 1581 for Louis Picot de Santeny, Intendant of Finances under Henri III. The château expanded when Louis XV created the Marquisate of Amboile-Ormesson in 1758.
Illustrious guests have graced its halls, from Bossuet and Madame de Sévigné to Diderot, the King of Württemberg, Queen Amélie of Portugal, King Mohammed V of Morocco, Princess Bibesco, and Pope John XXIII.
Olivier III d’Ormesson, Judge-Advocate at the Fouquet trial, Marshal Lyautey, and most recently Count Wladimir d’Ormesson, French ambassador to the Holy See, are among the notable figures who have lived here—alongside the era’s greatest writers, parliamentarians, diplomats and scholars.
The park, laid out from designs by Le Nôtre, creates a French perspective that culminates in a formal axis. A golf course has complemented the grounds since 1925.
In all, more than 140 hectares of green, just outside Paris.
Participation terms: Price: 8€ — Special rate | No booking required
Hours: Saturday, September 19, 2026 – 10:00 ⤏ 12:00, 14:00 ⤏ 17:30 | Sunday, September 20, 2026 – 10:00 ⤏ 12:00, 14:00 ⤏ 17:30
Are you ready to discover this 16th-century jewel?
Dates and Opening Time
From September 19, 2026 to September 20, 2026
Location
Château d'Ormesson
5 Rue de l'Église
94490 Ormesson sur Marne
Prices
Tarif spécial: €8
Official website
www.chateaudormesson.fr
Booking
www.tourisme-valdemarne.com
