Timeline

Key figures

Origin and history

Mont-Royal Castle was built between 1908 and 1911 near La Chapelle-en-Serval (Oise), on a hillside of the "station of La Chapelle", a forest belonging to the family estate of the Halphen. Sponsored by composer Fernand Halphen, it was designed by architect Guillaume Tronchet in a Louis XVI style, celebrating hunting (bas-reliefs by Georges Gardet) and music (inner theatre inspired by the Opéra Comique). The original project, rejected, provided for an Anglo-Norman or medieval style.

Fernand Halphen, mobilized in 1914, died in 1917 without taking long advantage of his castle. His widow, Alice de Koenigswarter, founded the Halphen Foundation there to support young composers. During World War II, the castle was looted and vandalized. In 1989, J.P. Hermier acquired it and transformed it into a 5-star hotel, opened in 1990 under the Concorde group, then renovated to reopen in 2024 under the sign Intercontinental Chantilly — Château Mont Royal.

The castle, with a theatre, restaurant and interior decor signed Georges Gardet, also served as a setting for films such as Les Trois Frères (1995) or Harry, a friend who wants you well (2000). Its complex architecture includes a hemicircular front and a gallery with views of the surrounding forest.

After decades of hotel usage, the site, bought in 1992 by the Concorde group, is preparing for a reopening in 2024 with high-end amenities: indoor swimming pool, spa, meeting rooms and two restaurants. Its history reflects both the artistic patronage of the Halphens and its adaptation to a contemporary tourist vocation.

The property, originally linked to the Halphen family (acquisition of the estate in 1882 by Georges Halphen), illustrates the evolution of private castles in France: from aristocratic or bourgeois residences to luxury hotel establishments, while maintaining a remarkable architectural and artistic heritage.

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