sentences:  From 1327, the Upper Silesian duchies were ruled by the dukes of the Piast dynasty and were subject to Bohemian overlordship.The Crown of Bohemia elected Polish-Lithuanian Jagiellons kings from 1471 and Austrian Habsburgs kings after 1526.In 1742, the area was conquered by the Prussian Hohenzollerns in Silesian Wars, setting the stage for the Prussian industrial might.