Having given Moravia to one brother, John Henry, and erected the county of Luxembourg into a duchy for another, Wenceslaus, he was unremitting in his efforts to secure other territories as compensation and to strengthen the Bohemian monarchy. To this end he purchased part of the upper Palatinate of the Rhine in 1353, and in 1367 annexed Lower Lusatia to Bohemia and bought numerous estates in various parts of Germany. On the death of Meinhard, Duke of Upper Bavaria and Count of Tyrol, in 1363, Upper Bavaria was claimed by the sons of the emperor Louis IV, and Tyrol by Rudolf IV, Duke of Austria. Both claims were admitted by Charles on the understanding that if these families died out both territories should pass to the House of Luxembourg. At about the same time, he was promised the succession to the Margravate of Brandenburg, which he actually obtained for his son Wenceslaus in 1373.