L'Isle Castle

L’Isle Castle in L’Isle, Switzerland, is a late 17th-century château created for the Chandieu family, members of the early modern European nobility, built in the French classical manner. Raised during the 1690s on the model of contemporary French taste, the house has been important locally as an early introduction of French classicism to French-speaking Switzerland and today is recognised as a cultural property of national significance.

The estate began as a seigneury (manorial lordship) that passed from the lords of Cossonay to the counts of Savoy and then to several local lineages. In 1614 Esaïe de Chandieu purchased the lordship and it later passed by inheritance to Charles de Chandieu, who served as lieutenant general in the armies of King Louis XIV. Charles de Chandieu married Catherine de Gaudicher in 1685; local tradition holds that she encouraged him to remove the earlier modest dwelling, which comprised a single main block with two round towers, and to erect a new château in its place.

Work on the new house took place in the 1690s. Plans by the well-known French architect Jules Hardouin-Mansart guided the rebuilding, and construction is recorded in accounts of the period as carried out in the mid-1690s, with one contemporary reference dating the château to 1696. The recorded building campaign commonly runs between 1694 and 1699 and replaced the earlier residence with the present U-shaped composition.

The Chandieu family kept ownership until the close of the 18th century. In 1810 the property passed to François-Louis Roulet of Neuchâtel and then entered the Cornaz family of Montet-Cudrefin by marriage. Local government acquired the estate in 1876 and the commune formally recorded it as municipal property on 20 January 1877. From 1878 the château served civic needs, housing a school and municipal offices. On 13 July 1996 a tricentennial celebration organised by François Reymondin drew some 600 participants, many dressed in period costume, marking three centuries since the late-17th-century rebuilding.