Saint Petersburg, Saint Petersburg, Russian Federation
Marly-le-Roi, Île-de-France, France
Reutlingen, Baden-Württemberg, Germany
Paris, Ile-de-France, France
Lisboa Region, Portugal
Mannheim, Germany
Hlavní město Praha, Czechia
Torino, Piemonte, Italy
Denver, CO, USA
Madrid, Community of Madrid, Spain
Bruchsal, Baden-Württemberg, Germany