The Dukes of Normandy were rulers of the historical region of Normandy in northern France. This title emerged in the 10th century when the Viking leader Rollo was granted land by the French king, establishing a powerful duchy. The dukes played a significant role in medieval European politics, often engaging in conflicts and alliances with neighboring territories. One of the most famous Dukes of Normandy was William the Conqueror, who became the first Norman king of England after his victory at the Battle of Hastings in 1066. The dukes contributed to the cultural and political landscape of both France and England, influencing the development of feudalism and governance in the region.