Warsaw, Masovian Voivodeship, Poland
Thessaloniki, Decentralized Administration of Macedonia and Thrace, Greece
Hafnarfjordhur, Greater Reykjavik, Iceland
Leipzig, Saxony, Germany
Berlin, Berlin, Germany
Tianjin Shi, China
Hiroshima, Japan
Istanbul, Istanbul, Turkey
Thessaloniki, Central Macedonia, Greece
Münster, North Rhine-Westphalia, Germany
Bergen, vestland, Norway
Riga, Riga, Latvia
