Kaliningrad, Kaliningrad obl, Russian Federation
Rostock, Mecklenburg-Vorpommern, Germany
Ville de Québec, Québec, Canada
Kiel, Schleswig-Holstein, Germany
Budapest, Budapest, Hungary
Enerhodar, Zaporiz'ka oblast, Ukraine
Leipzig, Saxony, Germany
Bad Nauheim, Hessen, Germany
Seoul, Korea, Republic of