- 1995
- Dagstuhl (Germany)
- 1996
- Schloss Rauischholzhausen (Germany)
- 1997
- Gargnano (Italy)
- 1998
- Santiago de Chile (Chile)
- 1999
- Lyon (France)
- 2000
- Osaka (Japan)
- 2001
- Giens (France)
- 2002
- Prague (Czech Republic)
- 2003
- Leuven (Belgium)
- 2004
- Karlsruhe (Germany)
- 2005
- Gdansk (Poland)
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