Aachen, Nordrhein-Westfalen, Germany
Düsseldorf, Nordrhein-Westfalen, Germany
Münster, North Rhine-Westphalia, Germany
Bonn, Nordrhein-Westfalen, Germany
Leipzig, Saxony, Germany
Raeren, Belgium
Aachen, North Rhine-Westphalia, Germany
Oldenburg (Oldenburg), Lower Saxony, Germany
Hildesheim, Niedersachsen, Germany
Mainz, Rhineland-Palatinate, Germany
Hamburg, Hamburg, Germany
Oldenburg, Niedersachsen, Germany