Duesseldorf, North Rhine-Westphalia, Germany
Bremen, Bremen, Germany
Saarbruecken, Saarland, Germany
Stuttgart, Baden-Wuerttemberg, Germany
Barcelona, Catalonia, Spain
Ann Arbor, Michigan, United States
Austin, Texas, United States
Hamburg, Hamburg, Germany
Lund, Skane, Sweden
Brooklyn, New York, United States
Niederkassel, Nordrhein-Westfalen, Germany
