The Château of Modave (French: Château de Modave), also known as the Château des Comtes de Marchin (Château of the Counts of Marchin) is a château near the village of Modave in the province of Liège, Belgium.
The oldest part of the building, the donjon, was built on a strategic rock high above the valley of the river Hoyoux. The oldest parts still visible today date probably from the 13th century and were erected by the lords of Modave. In the 16th century the castle and the estate of Modave became the property of the Haultepenne and de Saint-Fontaine families.
In the next century Jean-Gaspard-Ferdinand de Marchin (1601–1673), a great military commander, acquired the castle and turned it from a medieval fortress into a luxury Baroque residence. His son Ferdinand de Marsin neglected the property and lived in France.
Later owners were successively:
In the 19th century it was owned by the non-noble families of Lamarche, Braconier and Van Hoegaerden. Finally, the Compagnie Intercommunale Bruxelloise des Eaux ("Brussels Intercommunal Water Company") bought the property in March 1941, in order to protect the important water catchments in the park. The company still owns the château today and has been restoring it with great care. It is open for visitors from April until October and it is also used as a prestigious venue for concerts and receptions.
The ancient fortified castle was rebuilt from 1659 to 1667 in a manner showing a remarkable affinity to the most modern ideas of European country house building of the time. It is particularly close to the buildings of François Mansart. The dignified symmetry with a triangular pediment accenting the main frontage, the geometrical articulation of the wall, the mansard roofs, and the spatial contrast between the corps de logis and the side wings have much in common with Mansart's country houses, such as the Château de Maisons-Laffitte. Modave is the most prominent preserved example of High Baroque country-house architecture in the Southern Netherlands and the Prince-Bishopric of Liège.