Complex sentence: Historically, Görlitz was in the region of Upper Lusatia, however in 1815, some parts of Lusatia were integrated into the Province of Silesia, and later into the Province of Lower Silesia.
Split into simpler sentences: Historically, Görlitz was in the region of Upper Lusatia. However, in 1815, some parts of Lusatia were integrated into the Province of Silesia, and later into the Province of Lower Silesia.