According to the will of John George I, Christian received Merseburg and the cities of Bad Lauchstädt, Schkeuditz, Lützen, and Zwenkauand with their castles, half of the towns of Brehna, Zörbig, and Finsterwalde, and the Margraviate of Lower Lusatia, including the towns and castles of Lübben, Dobrilugk, Finsterwalde, Guben, Luckau, Calau, and Spremberg; this settlement created the Duchy of Saxe-Merseburg with Christian as its ruler.
#Eudoxia (1215–1240), married Count Dietrich I of Brehna and Wettin
After the German Burgward ("castle district"), which first crops up in one of Otto I's documents as "Pretimi", had passed in 1012 from Archbishop Dagino to the Church estate of Magdeburg, and then by way of the County of Brehna in 1290 to the Dukes of Saxony-Wittenberg, Rudolf I of Saxony-Wittenberg built the so-called "Schlösschen" (little castle) about 1335.