Greifen
In the early 12th century, Obodrite, Polish, Saxon, and Danish conquests resulted in vassalage and Christianization of the formerly pagan and independent Pomeranian tribes. Local dynasties ruled the Principality of Rügen (House of Wizlaw), the Duchy of Pomerania (House of Pomerania), the Lands of Schlawe and Stolp (Ratiboride branch of the House of Pomerania), and the duchies in Pomerelia (Samborides). Monasteries were founded at Grobe, Kolbatz, Gramzow, and Belbuck which supported Pomerania's Christianization and advanced German settlements.