Cologne, North Rhine-Westphalia, Germany
Bonn, North Rhine-Westphalia, Germany
Traben-Trarbach, Rheinland-Pfalz, Germany
Munich, Bavaria, Germany
Köln, Nordrhein-Westfalen, Germany
Freiburg im Breisgau, Baden-Wuerttemberg, Germany
Düsseldorf, North Rhine-Westphalia, Germany
Toulouse, France
Wien, Wien, Austria