Ronnenberg, Lower Saxony, Germany
Hamburg, Hamburg, Germany
Hannover, Niedersachsen, Germany
Konstanz, Baden-Württemberg, Germany
Kiev, Kyiv city, Ukraine
Tokyo, Japan
Freiburg im Breisgau, Baden-Württemberg, Germany
Hanoi, Hanoi City, Vietnam
Angers, Pays de la Loire, France
Hannover, Lower Saxony, Germany
Arequipa, Arequipa, Peru
Cologne, North Rhine-Westphalia, Germany