 It covered vast area, including current Racibórz, Gliwice, Mikołów and Wodzisław counties, as well as current city-county cities of Rybnik, Żory and Jastrzębie-Zdrój.Following First World War and the Upper Silesia plebiscite, most of that area became part of Poland.In 1975 administrative reforms repealed counties ("powiaty") in Poland.