In 668, at the request of Sigebert, king of Austrasia, Saint Remaclus, bishop of Maastricht, built a monastery in the county of Chiny, near the village of Cugnon. In 1173, the count of Chiny and the lord of Sainte-Cécile gave the domain of Conques to the Cistercians of Orval. Shortly after, Abbot Adam de Longwy established a grange or rural estate there.
In 1694, under Abbot Charles de Bentzeradt, Conques was elevated to a priory. The monks of Orval studied theology there. In 1715, the first stone of the church was blessed by Charles-Louis d'Apremont, superior of Conques. On 10 September 1717, Étienne Henrion, abbot of Orval, blessed the church and inaugurated divine service. A year later, in 1718, the three altars were blessed.
In 1795, the armies of the Revolution forced the community of Orval to retire to Conques with their archives and furnishings. In 1796, the Cistercian monks were driven from Conques and dispersed. Fifty years later, Conques was sold as a national asset. Several owners followed, including Alphonse de Prémorel — a man of letters passionate about archaeology and the sciences — who devoted his time and energy to restoring the former priory.
In 1913, the Norman Benedictine community of Saint-Wandrille found refuge at Conques with its exiled monks. In 1924, its successor Dom Pierlait brought them back to France.
In 1942, the De Naeyer family acquired the site and developed a fish farm (mainly eel and trout) on the Semois and the ponds of Conques, then exploited the surrounding meadows and forests. In 1963, Florimond and Simone De Naeyer renovated the place and made it a luxurious and welcoming establishment. Since 2018, the domain has had a new owner.
The site is classified as « Major Heritage of Wallonia » by Royal Decree of 24 October 1938 and by Decree of the Government of the Walloon Region of 7 August 1989.