The former abbey of Clairefontaine was a monastery for Cistercian sisters in Clairefontaine, near Arlon. Financially doped in 1247 by Ermesinde II van Namen and built by her son Hendrik V. In her will she chose her last resting place as a necropolis for the count's house of Luxembourg. Her tomb was discovered during excavations in the 19th century. At the end of the 16th century the abbatial church was enlarged together with the castle buildings. In the course of the 18th century, the buildings were raised to avoid further problems with the flooding of the Durbaach. The monastery was destroyed in 1794 by the French revolutionaries with their occupation of Luxembourg. The site was bought by the Jesuits in 1875 to build their Novitiate. These moved away in 1968. Today, an association watches over the management and maintenance of the site. Volunteers take guided tours in the ruins and chapel of Our Lady of Clairfontaine, built in the 19th century.