Roosendael Abbey (the abbey of the valley of roses) was a community of Cistercian nuns, founded in the 13th century on the banks of the River Nete in the Duchy of Brabant, at a location now in Sint-Katelijne-Waver. The monastery was established in or before 1227 by the nobleman Gillis Berthout, according to later tradition for his daughters Elizabeth and Oda. An early member of the community who gave it a wider reputation for sanctity was Blessed Ida of Louvain.