Municipality of Valletta, Malta (2007)
Municipality of Zagreb, Croatia (2004)
Municipality of Damascus, Syria (2003)
Municipality of Helsinki-Finland (2003)
Municipality of Athens, Greece (2002), (2003)
Collaboration protocol with the Municipality of Qingdao - People's...
Municipality of Nicosia, Sicily - Italy (2000 - 2002)
Municipality of Moscow, Russian Federation (1997), (2002), (2003-2004), ...