Osnabrueck, Lower Saxony, Germany
Berlin, Berlin, Germany
Clausthal-Zellerfeld, Lower Saxony, Germany
Takoma Park, MD, USA
Hemer, Nordrhein-Westfalen, Germany
Leipzig, Sachsen, Germany
Belgium
Münster, North Rhine-Westphalia, Germany
Vienna
Brunswick, Lower Saxony, Germany
Salamanca, Castilla y León, Spain