Saxe-Lauenburg was a historical duchy located in northern Germany, primarily in the region of Schleswig-Holstein. It emerged in the late Middle Ages and was known for its strategic position along trade routes. The duchy was ruled by the House of Saxe-Lauenburg, which was a branch of the larger House of Wettin. In the 16th century, Saxe-Lauenburg became a part of the Duchy of Saxe, and its territory changed hands several times due to political alliances and conflicts. The duchy was officially dissolved in the early 19th century, but its legacy remains in the cultural and historical landscape of the area.