Its capital was Żagań in Lower Silesia, the territory stretched to the town of Nowogród Bobrzański in the north and reached the Lusatian Neisse at Przewóz in the west, including two villages beyond the river (Pechern and Neudorf).

From 1322 to c. 1324–1325, Henry IV additionally controlled the eastern part of Lubusz Land with the towns of Torzym and Sulęcin, and the Międzyrzecz castellany in north-western Greater Poland.

[2] In 1329 all sons of Henry III of Głogów became vassals of King John of Bohemia - with the exception of Przemko II who died suddenly two years later.

After a fierce battle for the inheritance, in 1472 his son Jan II the Mad finally sold it to the Saxon duke Albert III the Bold with the consent of the Bohemian king Matthias Corvinus, thus ending the centuries-long Piast rule.

The Albertine and Ernestine branches came to a rupture when in the Schmalkaldic War of 1546–47 Duke Maurice of Saxony fought against his cousin John Frederick I, who by the Capitulation of Wittenberg had to renounce his claims to Żagań.

As a Bohemian fief, Emperor Ferdinand II of Habsburg in 1627 allotted Żagań to Albrecht von Wallenstein, then Duke of Frýdlant, Imperial generalissimo in the Thirty Years' War, who hosted his astrologer Johannes Kepler here.