Finds from prehistoric and ancient times indicate a very early settlement of Weilheim space. The oldest written mention of the place can be found on 1 October 769 in a deed of Lorsch Abbey. 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.