In the mid-12th century, a priest named Turstin withdrew to a wooded Norman hill to live as a hermit, where he was quickly joined by a circle of followers. When Turstin died in 1200, the bishop of Bayeux established the community under the Rule of St. Augustine. Turstin's brother-in-law Raoul de Percy donated land for the abbey. In 1210, under the protection of La Lucerne Abbey, the order was incorporated into the order of Saint Norbert. Over the following years, the abbey continued to receive donation from the de Percy and de Vassy families, as well as from lesser nobility and well-to-do farmers. At the end of the 13th century, a church and monastic buildings were built to replace the hermitage. In 1343 the abbey's gifts were interrupted by the Hundred Years' War and rivalries between pro