 In the years 1050 to 1070 founded Berthold II, Duke of Carinthia of the House of Zähringen the Limburg and a provost in Weilheim, which remained during 20 years the headquarter of the House of Zährigen.In 1319 count Ulrich of Aichelberg rose Weilheim to a city, which was fortified and rapidly gained importance because of the market law.1334 sold Graf Brun of Kirchberg the place for 7,500 guilders to the House of Württemberg.