Veliko Tarnovo, Veliko Tarnovo, Bulgaria
Plovdiv, Plovdiv, Bulgaria
Казанлък, Стара Загора, Bulgaria
Vilnius County, Lithuania
Shipka, Stara Zagora, Bulgaria
Frankfurt am Main, Hessen, Germany
Madrid, Community of Madrid, Spain
Tallinn, Harju County, Estonia
Warsaw, Masovian Voivodeship, Poland
Gabrovo, Gabrovo, Bulgaria
Viborg, Central Denmark Region, Denmark