| Amsterdam, North Holland, Netherlands, The Netherlands | ||
| Athens, Municipality of Athens, Regional Unit of Central Athens, Region of Attica, Attica, 10667, Greece | ||
| Berlin, Germany | ||
| Bratislava, Region of Bratislava, Slovakia | ||
| Brussels, Ville de Bruxelles - Stad Brussel, Brussels-Capital, Belgium | ||
| Budapest, Central Hungary, Hungary | ||
| Copenhagen, Copenhagen Municipality, Capital Region of Denmark, 1357, Denmark | ||
| Dublin, County Dublin, Leinster, Ireland | ||
| Helsinki, Helsinki sub-region, Uusimaa, Mainland Finland, Finland | ||
| Ljubljana, Upravna Enota Ljubljana, Slovenia | ||
| London, Greater London, England, SW1A 2DX, United Kingdom | ||
| Madrid, Área metropolitana de Madrid y Corredor del Henares, Community of Madrid, 28001, Spain | ||
| Nicosia, Cyprus, 1011, Cyprus | ||
| Prague, okres Hlavní město Praha, Hlavní město Praha, Prague, Czech Republic | ||
| Riga, Vidzeme, Latvia | ||
| Reykjavik, Capital Region, 101, Iceland | ||
| Sofia, Sofia City, Sofia-City, Bulgaria | ||
| Stockholm, Stockholms kommun, Stockholm County, Region Svealand, 111 29, Sweden | ||
| Tallinn, Harju maakond, 10146, Estonia | ||
| Vilnius, Vilnius city municipality, Vilnius County, Lithuania | ||
| Warsaw, Masovian Voivodeship, Poland |