Kazan, Tatarstan Republic, Russia
Karlsruhe, Baden-Wuerttemberg, Germany
Amsterdam, North Holland, Netherlands
Siegen, North Rhine-Westphalia, Germany
Lensahn, Schleswig-Holstein, Germany
Thessaloniki, Makedonia Thraki, Greece
Graz, Steiermark, Austria
Kamen, Germany
Bonn, Germany
