Hamburg, Hamburg, Germany
Aachen, North Rhine-Westphalia, Germany
Jena, Thuringia, Germany
Cologne, North Rhine-Westphalia, Germany
Lugano, Ticino, Switzerland
Karlsruhe, Baden-Württemberg, Germany
Region of Murcia, Spain
Düsseldorf, Nordrhein-Westfalen, Germany
Berlin, Berlin, Germany
Wrocław, Lower Silesian Voivodeship, Poland