Essen, North Rhine-Westphalia, Germany
Stuttgart, Baden-Wuerttemberg, Germany
New York, USA
Berlin, Berlin, Germany
Karlsruhe, Baden-Wuerttemberg, Germany
Dortmund, North Rhine-Westphalia, Germany
Novosibirsk, Novosibirsk, Russia
Karlsruhe, Baden-Württemberg, Germany
Kassel, Hesse, Germany