Düsseldorf, Nordrhein-Westfalen, Germany
Bochum, Nordrhein-Westfalen, Germany
Graz, Steiermark, Austria
Bochum, North Rhine-Westphalia, Germany
Ciudad de México, México city, Mexico
Freiburg, Baden Württemberg, Germany
Toulouse, Haute-Garonne, France
Gevelsberg, North Rhine-Westphalia, Germany
Ennepetal, North Rhine-Westphalia, Germany