 The outbreak of World War Two terminated these plans

Since the 12th century, the river formed eastern border of the Silesian Duchy of Racibórz with Lesser Poland.From 1846 until 1918, on the so-called Three Emperors' Corner, at the confluence of Black and White Przemsza marked the tripoint of Kingdom of Prussia, Austrian Empire and Russian Empire.Nowadays the lower Przemsza forms the border between Silesian Voivodeship in the west and Lesser Poland Voivodeship in the east.