The Duke of Saxe-Lauenburg was a title held by the rulers of the duchy of Saxe-Lauenburg, a historical region in northern Germany. Established in the late Middle Ages, the duchy was part of the larger Saxony region and played a significant role in the political landscape of the Holy Roman Empire. The dukes were often involved in various alliances and conflicts, influencing the area's governance and culture. The title of Duke of Saxe-Lauenburg became extinct in the 17th century, but the region's history continued to impact the surrounding areas. Today, Saxe-Lauenburg is known for its picturesque landscapes and historical sites, reflecting its rich heritage.