Bochum, North Rhine-Westphalia, Germany
Germany
Singapore, Singapore
Bonnybridge, Scotland, United Kingdom of Great Britain and Northern Ireland
Cologne, North Rhine-Westphalia, Germany
Solingen, Nordrhein-Westfalen, Germany
Düsseldorf, North Rhine-Westphalia, Germany
Bonn, North Rhine-Westphalia, Germany
Berlin, Germany
Hilden, North Rhine-Westphalia, Germany
Aachen, Nordrhein-Westfalen, Germany