City
Country
Year
Freiburg
Germany
Besançon
France
1959
Innsbruck
Austria
1963
Padua
Italy
1967
Guildford
Great Britain
1979
Madison
USA
1987
Matsuyama
Japan
1988
Lviv (Lemberg)
Ukraine
1989
Granada
Spain
1991
Isfahan
Iran
2000
Friendship City
Wiwilí
Nicaragua
Freiburg and the Zähringer Cities
Zähringer Cities
D/CH
