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Origin and history

The castle of L'Isle-Adam, located on the island of Priory in Val-d'Oise, was originally built in 825 as a castle to counter Norman invasions. Mentioned in 1069 near a priory, he was entrusted to the Adam family, who gave his name to the city. In the Middle Ages, the seigneury included L'Isle-Adam, Parmain and Valmondois, and the castle was rebuilt several times.

In 1360 the castle passed to the Villiers de L'Isle-Adam, of which Philip (1464-1534) became Grand Master of the Order of Malta. By marriage he entered the Montmorency family in 1527 and was confiscated in 1632 after the execution of Henry II of Montmorency. Louis XIII restored him partly to his sisters, including Charlotte, wife of Henri II of Bourbon-Condé, thus integrating the estate into Condé's house.

In 1656 the castle became the property of the Conti, a branch of the Bourbons, after the division of property of Henri II of Condé. Armand de Bourbon-Conti inherited it, but it was his son, François Louis (the "Grand Conti"), who had it restored in 1707 after a fire in 1669. The estate was enlarged, and the castle modernized until its destruction in 1813, after its confiscation as a national property in 1798.

The site, strategic in the Middle Ages to control Oise, presented architectural challenges: small island size, soil instability and infiltration. The castle, of classical style after 1671, included a central body framed by pavilions, gardens and a performance hall. Its stables, built in 1777 for 225 horses, bear witness to its bliss before its demolition.

After 1821, a new house was built on the ruins by the Ducamp family and rebuilt after a fire in 1870. The site now houses the Louis Senlecq Museum of Art and History, managed by the municipality of L'Isle-Adam since 2005.

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