Conference history
| Year | Spring | Autumn |
| 2008 | Athens 5 | ∗ |
| 2007 | Brussels | ∗ |
| 2006 | ∗ | Udine (5-8 October) |
| 2005 | Helsinki (26-29 May) | ∗ |
| 2004 | Porto (13-17 May) | Paris (11-13 November) |
| 2003 | Berlin (1-4 May) | Bern (2-5 October) |
| 2002 | Amsterdam (3-5 May) | Florence (3-6 October) 4 |
| 2001 | Madrid (27-29 April) | Budapest (14-16 September) |
| 2000 | Dublin (29 April-1 May) | Copenhagen (13-16 September) 3 |
| 1999 | Istanbul (22-25 April) | Vienna (24-26 September) |
| 1998 | Lisbon (1-3 May) | London (17-19 September) 2 |
| 1997 | Barcelona (25-27 April) | Prague (26-28 September) |
| 1996 | Paris (25-28 April) 1 | Rome (4-6 October) |
| 1995 | Düsseldorf (22-23 April) | Basel (29 September-01 October) |
| 1994 | Geneva (5 March) | Brussels (22-23 October) |
1 In cooperation with International Committee PIA, AIA London/UK and the US Embassy in Paris.
2 In cooperation with International Committee PIA and AIALondon/UK.
3 In cooperation with International Committee PIA, AIA London/UK and the US Embassy in Copenhagen.
4 In cooperation with International Committee PIA and AIA London/UK.
5 In cooperation with Ecoweek.