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The Prieuré de l'Oiselière is a priory located at Saint-Planchers, near Granville, in France. Nestled in a valley bordering the watercourse that bears its name, surrounded by fortified walls and moats, it's history dates back to the 12th century. It was a dependency of the abbots of Mont-Saint-Michel who organised the cultivation of the fields and the woods and collected taxes.