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Melleray Abbey (French: Abbaye de Notre-Dame-de-Melleray) was a Cistercian monastery, founded about the year 1134. It was situated in La Meilleraye-de-Bretagne in the vicinity of Châteaubriant in Brittany, in the present Loire-Atlantique, France, and in the Diocese of Nantes. Between 1817 and 2016 it was a house of Trappist monks. Since 2016 it has been used by the Chemin Neuf Community.