Hamburg, Hamburg, Germany
Zabrze, Silesian Voivodeship, Poland
La Línea de la Concepción, Cadiz, Spain
Sosnowiec, Silesia, Poland
Passau, Bavaria, Germany
Katowice, Silesia, Poland
Koblenz, Rhineland-Palatinate, Germany
Wrocław, Poland
Kraków, Malopolskie, Poland
Ruda Śląska, Silesian Voivodeship, Poland
Prague, Prague, Czechia
Möhnesee, North Rhine-Westphalia, Germany