Landsberg

Landsberg was a margraviate in Osterland, with its residence at Weißenfels. In 1337 the Welf duke Magnus I held it through his marriage to Sophia, an Ascanian heiress.

In 1347 Magnus sold Landsberg to Margrave Frederick II of Meissen, returning the territory to the Wettin dynasty. Its lands, including Leipzig, became part of the core of the later Saxon electorate.