Cologne, North Rhine-Westphalia, Germany
Bruchsal, Baden-Württemberg, Germany
Saint Petersburg, Saint Petersburg, Russian Federation
Aachen, North Rhine-Westphalia, Germany
Madrid, Community of Madrid, Spain
Köln, Nordrhein-Westfalen, Germany
Madrid, Comunidad de Madrid, Spain
Essen, Nordrhein-Westfalen, Germany
Lisboa, Lisboa, Portugal
Beverungen, Nordrhein-Westfalen, Germany