Jena, Thüringen, Germany
Cape Breton, Nova Scotia, Canada
Hamburg, Hamburg, Germany
Berlin, Berlin, Germany
Rennes, Bretagne, France
Sellin, Mecklenburg-Vorpommern, Germany
Québec, Quebec, Canada
Stuttgart, Baden-Württemberg, Germany
Karlsruhe, Baden-Württemberg, Germany
Wuppertal, Germany
Besançon, Bourgogne Franche-Comté, France