Duisburg, Nordrhein-Westfalen, Germany
Muenster, North Rhine-Westphalia, Germany
Sankt Augustin, North Rhine-Westphalia, Germany
Bremen, Bremen, Germany
Frankfurt am Main, Hessen, Germany
Cologne, North Rhine-Westphalia, Germany
Bonn, North Rhine-Westphalia, Germany
Hamburg, Hamburg, Germany
Oberhausen, North Rhine-Westphalia, Germany
Braunschweig, Lower Saxony, Germany