The intention is to bolden up any European country you've visited at least once.
Albania , Andorra, Armenia,Austria, Azerbaijan, Belgium, Belarus, Bosnia-Herzegovina, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Georgia, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Macedonia, Malta, Moldova, Monaco, Netherlands, Norway, Poland, Portugal, Romania, Russia, San Marino, Serbia/Montenegro, former Yugoslavia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, Ukraine,
United Kingdom, Vatican