The Dukes of Aquitaine were powerful noble rulers in the region of Aquitaine, located in southwestern France. This title emerged in the early Middle Ages and was held by various influential families, including the Plantagenets. The dukes played a significant role in the political landscape of France and England, often engaging in conflicts and alliances. One of the most notable dukes was Eleanor of Aquitaine, who became queen consort of both France and England. Her marriage to Henry II of England helped expand the territories under the control of the English crown, making the Dukes of Aquitaine key figures in medieval European history.