Upon the death of Margrave
Conrad in 1156, the Wettin domains of Meissen and Lusatia were re-arranged. Conrad's younger son Margrave
Theodoric I of Lusatia had Landsberg Castle erected until 1174 and began to style himself a "Margrave of Landsberg". However, an
Imperial State in its own right was not established until in 1261, when Margrave
Henry the Illustrious (against legal provisions) split off the western Landsberg territory from the March of Lusatia as a separate margraviate for his second son
Theodoric. After Dietrich's son
Frederick Tuta had died without male heirs in 1291, his uncle Margrave
Albert II of Meissen sold it to the
Ascanian margrave
Otto IV of Brandenburg. In 1327 the
Welf duke
Magnus I of Brunswick-Lüneburg inherited Landsberg by marrying
Sophia of Brandenburg-Stendal, the sister of the last Ascanian margrave
Henry II and also the niece of the German king
Louis IV, who had seized the Brandenburg possessions in 1320. Duke Magnus sold Landsberg to Margrave
Frederick II of Meissen in 1347, and in this way the former margraviate finally fell back to the House of Wettin. ==Margraves==