The Dukes of Pomerania were a series of rulers in the historical region of Pomerania, located along the southern shore of the Baltic Sea in present-day Poland and Germany. This duchy emerged in the 12th century and played a significant role in the political landscape of northern Europe, often engaging in alliances and conflicts with neighboring states. The dynasty was divided into several branches, with notable dukes such as Bogislaw IV and Casimir IV. The Dukes of Pomerania were influential in the spread of Christianity in the region and contributed to the development of trade and culture until the duchy was absorbed into the Kingdom of Prussia in the 17th century.