Casimir I, Duke of Pomerania

Who was Casimir I, Duke of Pomerania?

Casimir I was duke of Pomerania since his uncle Ratibor I's death in 1155/56. A son of Wartislaw I, he co-ruled Pomerania with his older brother Bogislaw I, receiving Pomerania-Demmin as his share just as Bogislaw received Pomerania-Stettin, and ruling the remainder in common.

After the lost 1164 Battle of Verchen, where Casimir and Bogislaw aided an Obodrite rebellion against the duke of Saxony, Henry the Lion, Casimir and Bogislaw joined Saxony receiving their respective part duchies as a fief from Henry the Lion. Casimir also received one third of the Danish terra Wolgast. When Saxony allied with the Danes to subdue the Rani kingdom of Rügen in 1168, Casimir as well as Bogislaw aided Henry. Casimir also managed to take control in Circipania, thereby expanding Pomerania to the West.

Casimir participated in other campaigns launched by Henry the Lion, as an 1178/79/80 expedition into Lusatia and Jüterbog.