București, Municipiul București, Romania
Freiburg im Breisgau, Baden-Wuerttemberg, Germany
Greifswald, Mecklenburg-Vorpommern, Germany
Stuttgart, Baden-Wuerttemberg, Germany
Hamburg, Hamburg, Germany
Berlin, Berlin, Germany
London, London, England
Maastricht, Limburg, Netherlands
Zaragoza, Aragon, Spain
Frankfurt, Hesse, Germany
Dublin, Dublin, Ireland (Republic of)