Le mystère du Grand-Duc

The Mystery of the Grand Duke in Champs-sur-Marne

Looking for an unusual experience for the whole family? Try your hand at the enigmas of an adventure game in a historic and enchanting setting.

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Covid-19 information : a health pass or a test taken within the last 48 hours is required at the entrance.

In 2021, the castle of Champs-sur-Marne invites you to a life-size Adventure Game in search of the most coveted diamond in history.

Play in a historical setting

The plot is as follows: the Grand Duke, an incredible 137-carat diamond that belonged successively to Marie-Antoinette, Napoleon and then to the Empress Elisabeth of Austria, known as "Sissi", resurfaces after more than a century, at the château de Champs-sur-Marne. To discover it and take your turn, discover its hiding place while thwarting the danger of the mysterious curse that surrounds it.

A fun game for the whole family, the Mystery of the Grand Duke plunges you into the past at the time of the Belle Epoque, thanks to two actors and the enchanting setting of the 18th century castle. This unusual experience allows you to experience a moment of complicity and discovery with your children every weekend until 2 January 2022. Use your sense of observation and your grey cells to answer riddles that are both historical and educational and finally solve the enigma. Will you rise to the challenge?

An area to discover

The game lasts 45 minutes, which leaves you time to admire the estate, consisting of the magnificent château, whose current decoration reproduces the life of the nobility at the beginning of the 20th century, and the 85-hectare gardens designed by Le Nôtre in the "French style". Your Adventure Game ticket allows you to visit the entire building as well as areas usually closed to the public. Stroll through the vast salons with their restored decor and period furnishings, an illustration of French know-how and craftsmanship. From room to room and over 1000m², the luxury and taste of the last owner, Count Louis Cahen d'Anvers, immerse yourself in the atmosphere of the château as it was in 1910.

In the park, the gardens labelled remarkable give you a glimpse of the knowledge and skill of the horticultural artists who were able to restore the splendour of the planted areas as experienced by the illustrious guests who stayed at the château, such as the Marquise de Pompadour, Diderot, Voltaire, Chateaubriand and even Marcel Proust. This "maison de plaisance", as these residences were called at the time, received the fine minds of the arts and letters.

Numerous other events are held throughout the year on the estate: walks, themed guided tours, farmers' markets, find out more and remember to book your tickets!

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Community facilities

Access and contact

31 rue de Paris
77420 Champs-sur-Marne

    Days and opening hours

    From 05/09 to 31/10/2021, every Sunday between 1.30 pm and 5.30 pm.


    • Adult: 14 €, Child (12 years): 8 €.


    Spoken languages

    • French
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