La Maigrauge Abbey or Magerau Abbey (French: Abbaye de la Maigrauge; German: Abtei Magerau) is a Cistercian nunnery located in Fribourg, Switzerland, and founded in 1255. The abbey is sited on the Saane and is on the border between French-speaking and German-speaking Switzerland. The community is bilingual. Besides a bakery for communion wafers and a guesthouse, the nuns also maintain a biogarden and a nunnery shop, which sells the abbey's cordial, made of herbs, known as Grünes Wasser or eau vert ("green water").