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Origin and history

Athis Castle, located in Athis-Mons in Essonne, was built in the 17th century by the family of La Brousse on the site of an ancient 15th century seigneurial residence. It adopts a classic plan with a central stone body, two rectangular wings, and an honorary courtyard framed by pavilions. The estate, enlarged over the centuries, was marked by major developments under Louise Anne de Bourbon, known as the Mademoiselle de Charolais, in 1743, which replaced the French park and moved the seigneurial farm to create an axial perspective.

In 1865, the castle was acquired by the Jesuit Brotherhood, which set up a preparatory school for major military schools such as Polytechnique and Saint-Cyr. Born in 1881 to the Chodron de Courcel family, the estate underwent new developments, including the addition of turrets and a gallery leading to a seigneurial chapel. The castle, registered as a historical monument in 1928, has been home since 1946 to the private school Saint-Charles, after having been partly remodelled to accommodate school and sports buildings.

The park, originally built in the 17th century and embellished in the 18th century by Mademoiselle de Charolais, lost much of its architectural elements (walls, fountains, canal) over time. The gardens, organized in terraces on the hillside, once offered an exceptional view of the Seine, comparable to that of neighbouring castles such as Juvisy or Épône. Today, the site combines historical heritage and educational function, while preserving traces of its aristocratic and religious past.

Among the remarkable elements, the octagon pavilion built in 40 days to receive Louis XV in 1743 illustrates the fascist of the estate at its peak. This pavilion, richly furnished and decorated, was destroyed during revolutionary lootings, leaving only its foundations. The castle also preserves an 18th century seigneurial chapel, integrated into the commons, as well as an orangery in brick and stone added at the beginning of the 20th century.

The architecture of the castle reflects the stylistic and functional evolutions of its successive owners: from the 17th century classicism to the neoclassical additions of the 19th century, to the transformations related to its school use in the 20th century. Materials, such as cut stone and flat tiles, as well as landscape developments, bear witness to its turbulent history, between noble residence, place of worship, and educational institution.

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