Aachen, North Rhine-Westphalia, Germany
Hamburg, Hamburg, Germany
Aachen, Nordrhein-Westfalen, Germany
Duesseldorf, North Rhine-Westphalia, Germany
Lviv, Lviv Oblast, Ukraine
Moscow, Moscow City, Russian Federation
Herrenberg, Baden-Württemberg, Germany
Bremen, Bremen, Germany
Köln, Nordrhein-Westfalen, Germany
Münster, North Rhine-Westphalia, Germany