 Lubusz was a suffragan diocese of the Archbishopric of Gniezno, a first bishop "Bernard" is documented in 1133, who is identical with Bernard of Spain, a missionary among the Pomeranians.With the fragmentation of Poland among Bolesław's sons the influence of the Empire increased.Lebus fell to the Duchy of Silesia held by the heirs of Bolesław's first-born son Władysław II the Exile, and the area became a destination of the German "Ostsiedlung".