Warsaw, Mazovia, Poland
Cologne, North Rhine-Westphalia, Germany
Mannheim, Baden-Württemberg, Germany
Völklingen, Saarland, Germany
Viernheim, Hessen, Germany
Paderborn, Nordrhein-Westfalen, Germany
Blantyre, Malawi
Potsdam, Brandenburg, Germany
Innsbruck, Tirol, Austria
Düsseldorf, Nordrhein-Westfalen, Germany
Wuppertal, North Rhine-Westphalia, Germany