Val-Saint-Lambert Abbey (French: Abbaye du Val-Saint-Lambert) was a Cistercianabbey in the Prince-Bishopric of Liège. It is situated in the Walloonmunicipality of Seraing on the right bank of the Meuse, in Belgium, about 13 kilometres (8.1 mi) southwest of Liege. Founded in 1202, the abbey’s monks were expelled during the French Revolution. In the 19th century, the building ruins were converted into the Val Saint Lambertcrystal factory. The structure is considered to be an important example of Cistercian architecture.

Several original buildings from the ancient abbey remain, such as the 13th century Chapter House; the 17th century House of Outsiders chateau, built in Mosan Renaissancestyle, which houses the crystal museum; and the 18th century abbey entrance, which serves as Seraing’s Tourist Information Office. The abbey was classified as a historical monument in 1973. The structure is considered to be an important example of Cistercian architecture as well as Gothic architectural development in Belgium.