By late 1867 the Berlin-Görlitz line was complete and the route, which passed through the countryside of the Spreewald and the Lower Lusatia and the towns of Königs Wusterhausen, Lübben and Lübbenau, officially opened on 31 December 1867.
The exact origins of the boysenberry are unclear but the most definite records trace the plant as it's known today back to grower Rudolph Boysen, who may have gotten the dewberry/loganberry parent from the farm of a man by the name of John Lubben (who called it a "lubbenberry"), who in turn may have gotten it from Luther Burbank.
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.
Important towns beside Cottbus and the historic capitals Lübben and Luckau include Calau, Doberlug-Kirchhain, Finsterwalde, Forst, Guben/Gubin, Lauchhammer, Lübbenau, Senftenberg, Spremberg, Vetschau, and Żary in present-day Poland.
When Lubben identifies interested individuals, she sends care packages filled with religious literature, Bibles, Christian music, local grocery and department store gift cards, and other spiritual and practical supports.
In the Spreewald the river passes through the towns of Lübbenau, Lübben and Leibsch.