 Complete the following phrase:  Feudalism took hold in France during the 10th and 11th centuries, and Nantes was the seat of a county founded in the ninth century. Until the beginning of the 13th century, it was the subject of succession crises which saw the town pass several times from the Dukes of Brittany to the counts of Anjou of the House of Plantagenet. During the 14th century, Brittany experienced a 