Sofia, Sofia City Province, Bulgaria
Sliven, Sliven Province, Bulgaria
Riga, Riga, Latvia
Jena, Thuringia, Germany
Blagoevgrad, Blagoevgrad, Bulgaria
Cerdanyola del Vallès, Catalunya, Spain
Mārupe, Latvia
Warsaw, Poland, Poland
Wrocław, Lower Silesia, Poland
Gaziemir, izmir, Turkey
Merter, Istanbul, Turkey
