The Duchy of Gottorp was a historical territory located in northern Germany, primarily in the region of Schleswig. It emerged in the 16th century and was ruled by the House of Gottorp, a branch of the House of Oldenburg. The duchy played a significant role in the political landscape of the time, often involved in conflicts and alliances with neighboring states. In 1773, the Duchy of Gottorp was incorporated into the Duchy of Schleswig, which was part of the larger Danish Realm. The duchy is notable for its cultural contributions, including the construction of the Gottorp Castle, which served as a residence for its dukes and remains a symbol of its historical significance.