Until the 8th century the parish of "Abbaretiacum" had its own Lord Bishop under the Bishops of Nantes. Following the invasion of Normandy and civil wars in Brittany in the 11th and 12th centuries Abbaretz ceased to be a feudal state. During the 10th century the lords of Chateaubriand took effective possession of the territory of Abbaretz: to enter Abbaretz was a privilege they gave to one of their younger sons, known by the name of "Le Boeuf" who was First Lord of Nozay and Issé. In 1123, however, the Duke Conan confirmed the church of Nantes as the owner of the church at Abbaretz.