This estate was owned by the Fastré de la Neuville family, better known as Longchamps, in the mid-15th century. A first castle, the date of construction of which is unknown but of which some remains remain, remained in the Longchamps family until 1710 when Marie-Françoise de Longchamps, wife of Charles Jean-Baptiste de Fabritius, then bequeathed the property to her daughter Marie-Catherine Françoise de Fabritius. After she married Waltère de Sélys, the estate passed to the barons of Sélys-Longchamps 1 . The castle was built for Michel-Laurent de Sélys ( 1759 - 1837 ), who in 1795 , the year of the reunification of the principality of Liège with France , was president of the new municipal council of Liège and in 1800 mayor under the consulate . Michel Laurent de Sélys Longchamps was married to Marie Denise Gandolphe, born in Paris on 19 March 1777 and died at the Château de Longchamps under the Second Empire, on 28 October 1857. Marie Denise was the daughter of Mathieu Joseph Gandolphe and Denise Jacqueline d'Aran des Castans. Michel-Laurent de Sélys-Longchamps asked the Parisian architect Aimé Dubois for plans for a new castle. The project was entrusted to the Liège entrepreneur Duckers and the Parisian sculptor Mongin. The construction of the castle was completed in 1810. During the emperor's reign, magnificent parties were held there.
Source: Wikipedia