In 1134 Lothar appointed the Ascanian Albert the Bear as Margrave of Brandenburg and in 1136 Conrad the Great of Wettin, already margrave of Meissen, for the office of the Margraviate of Lusatia, thereby uniting the two marches. In addition, he petitioned the pope to grant more executive rights for the Archbishoprics of Bremen and Magdeburg. King Eric II of Denmark was made an imperial prince of the emperor in 1135, and member of the Reichstag. Lothair's diplomatic missions to the warring parties of Poland and Bohemia/Hungary were successful and resulted in overdue tribute payment by the Polish Duke Bolesław III Wrymouth for the 1121 established Duchy of Pomerania, which in addition to the island of Rügen was eventually secured as a fief of the Empire.