Reutlingen, Baden-Württemberg, Germany
Llanes, Asturias (Principality of), Spain
Siegen, Nordrhein-Westfalen, Germany
Enschede, Overijssel, Netherlands
Leipzig, Saxony, Germany
Münster, Nordrhein-Westfalen, Germany
Ludwigsau, Hessen, Germany
Bielefeld, North Rhine-Westphalia, Germany
Leuven, Flemish-Brabant, Belgium
Seoul, Seoul, South Korea
Brussels, Brussels, Belgium
