In the heart of the Oise valley, on the Île du Prieuré, the Château Conti reveals itself in a lush setting, facing the river, the dam, the locks and the Plage de L’Isle-Adam. Labeled Patrimoine d’intérêt régional, this estate attracts as much for its panorama as for the traces of history it preserves.
Its name recalls the Princes of Bourbon-Conti, one of the great dynasties that shaped the history of L’Isle-Adam. Yet what is today called Château Conti is not the old princely château itself, but a bourgeois residence erected in the 19th century by Alfred Ducamp. It sits on a site where, since the year 1000, the homes of the lords of L’Isle-Adam have stood: the Adam de L’Isle, the Villiers de L’Isle-Adam, the Montmorency, and then the Bourbon-Conti.
This house, designated a Regional Heritage of Interest site, has the discreet air of a villa, yet it carries a far older history. Built around 1857 in brick and stone in a Louis XIII-inspired style, it features a regular layout, a slate roof, and façades with evenly spaced bays that lend it its elegance. The site’s appeal also lies in its location at the tip of the Île du Prieuré, a belvedere opening onto the Oise, in a landscape that speaks to leisure, river heritage, and the region’s seigneurial history.
Burned during the 1870 war, the residence was rebuilt to exacting standards before going on to live several lives: a hotel, a sanatorium, a restaurant under the sign of the Royal Conti after 1918, then a period of abandonment. Acquired by the municipality in 2005, the estate has since undergone a major rehabilitation. It now houses municipal services, the services tied to the Louis-Senlecq Museum of Art and History, the association Friends of L’Isle-Adam, as well as exhibitions in the ground-floor rooms.
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