Paderborn, North Rhine-Westphalia, Germany
Essen, North Rhine-Westphalia, Germany
London, United Kingdom
Viersen, Nordrhein-Westfalen, Germany
Wuppertal, Nordrhein-Westfalen, Germany
Enschede, Overijssel, Netherlands
Auckland, Auckland, New Zealand
Bonn, North Rhine-Westphalia, Germany
Wuppertal, North Rhine-Westphalia, Germany
Aachen, North Rhine-Westphalia, Germany