Witten, Nordrhein-Westfalen, Germany
Saint Petersburg, Saint Petersburg, Russian Federation
Berlin, Berlin, Germany
Bogotá, Bogotá, Colombia
Burgas, Burgas, Bulgaria
Wettringen, North Rhine-Westphalia, Germany
Cologne, North Rhine-Westphalia, Germany
Sofia, Sofia, Bulgaria
Jerusalem, Jerusalem district, Israel
Vitoria-Gasteiz, Basque Country, Spain
