Bohemia-Moravia, under King Charles, I, who as Charles IV is also German emperor, extends into Germanic territory with its annexation of Lower Lusatia in 1367.

The castle of Lubin in the March of Lusatia was first mentioned in an 1150 register of Nienburg Abbey and had received town privileges according to Magdeburg law by 1220.

From 1301 the town in the center of the Spreewald floodplain was in the possession of the monks of Dobrilugk Abbey, who sold it to Duke Rudolph I of Saxe-Wittenberg in 1329.

After several conflicts with the Wittelsbach margraves of Brandenburg, the March of Lustia is finally acquired in 1367 by the Emperor, who incorporates Lübben into the Kingdom of Bohemia.