Bucharest, Bucharest, Romania
Tallinn, Harju county, Estonia
Zagreb, Zagreb City, Croatia
Sofia, Sofia, Bulgaria
Nis, Central Serbia, Serbia
Sofia, Sofia-city, Bulgaria
Kristiansand, Vest-Agder, Norway
ANNECY, Rhone-Alpes, France
Warsaw, Mazovia, Poland
Stuttgart, Baden-Württemberg, Germany
Hamburg, Hamburg, Germany