Silesian industry suffered badly after the war. To stimulate the economy Protestant Czechs, Germans and Poles were invited to settle in the country, particularly in Upper Silesia. Most of the settlers originated from non-Prussian countries, since Frederick II also wished to increase Prussia's population. The Poles, most from the Habsburg-ruled area around Teschen, settled all over Upper Silesia, whereas the Czechs mainly located in the areas around Oppeln, Strehlen and Groß Wartenberg. With the recruitment of Germans from Middle and Western Germany many mine and lumber settlements were established. Large estate owners soon followed and founded many new settlements. Frederick II supported the reconstruction of the cities, sometimes by donation from his privy purse, but more by measures to stimulate the economy, such as the ban on wool exports to Saxony or Austria and the increase of customs duties.