Varna, Varna, Bulgaria
Frankfurt, Hessen, Germany
Bietigheim-Bissingen, Baden-Württemberg, Germany
Eskişehir, Eskişehir, Turkey
Munich, Bavaria, Germany
Düsseldorf, North Rhine-Westphalia, Germany
Frankfurt, Hesse, Germany
Bamberg, Bavaria, Germany
Karlsruhe, Baden-Wuerttemberg, Germany
Frankfurt am Main, Hessen, Germany
Freiburg im Breisgau, Baden-Württemberg, Germany
Linz, Upper Austria, Austria