sentences:  During the Partitions of Poland, Częstochowa was seized by the Kingdom of Prussia in 1793, and incorporated into the province of South Prussia, Department of Kalisz (Kalisch).The Old Częstochowa became the seat of a county (see Districts of Prussia).During the Napoleonic Wars, in 1807 Częstochowa became part of the Duchy of Warsaw, and in 1815, Russian-controlled Congress Poland, in which it remained until World War One.