Barcelona, Catalonia, Spain
Leipzig, Saxony, Germany
Hamburg, Hamburg, Germany
Göttingen, Lower Saxony, Germany
Hamburg, Germany
Bremen, Bremen, Germany
Blankenfelde-Mahlow, Brandenburg, Germany
Karlsruhe, Baden-Württemberg, Germany
Madrid, Community of Madrid, Spain
Wien
Leipzig, Sachsen, Germany
Lübeck, Schleswig-Holstein, Germany