Dortmund, Nordrhein-Westfalen, Germany
Stuttgart, Baden-Württemberg, Germany
Bad Honnef, North Rhine-Westphalia, Germany
Düsseldorf, North Rhine-Westphalia, Germany
Genève, Switzerland
New York, NY, USA
Cologne, Germany
Lausanne, Vaud, Switzerland
essen, essen, Germany
Muelheim an der Ruhr, North Rhine-Westphalia, Germany