Liste des Conférences mondiales
| Year | Venue | Country | Date | Participants | |
| 1 | 1953 | Lucerne | Switzerland | 25-25 October | 71 |
| 2 | 1955 | Horsens | Denmark | 1-5 August | |
| 3 | 1959 | Jambville | France | 12-13 August | 250 |
| 4 | 1961 | Woudschoten | Netherlands | 28-29 October | 81 |
| 5 | 1963 | Castelgandolfo | Italy | 22-27 July | 63 |
| 6 | 1965 | Brussels | Belgium | 27-29 August | |
| 7 | 1967 | Durham | United Kingdom | 14-21 July | 300 |
| 8 | 1969 | Gripsholm | Sweden | 23-25 August | 190 |
| 9 | 1971 | Melbourne | Australia | 30 September-4 October | |
| 10 | 1973 | Vienna | Austria | 9-13 July | 400 |
| 11 | 1975 | Aalborg | Denmark | 15-20 August | 600 |
| 12 | 1977 | Montreux | Switzerland | 25-29 July | 464 |
| 13 | 1979 | Bergen | Norway | 5-11 August | |
| 14 | 1981 | Dijon | France | 20-25 July | |
| 15 | 1983 | Dalfsen | Netherlands | 11-16 July | |
| 16 | 1985 | Christchurch | New Zealand | 1-8 February | |
| 17 | 1987 | Coventry | United Kingdom | 19-24 July | |
| 18 | 1989 | Aalborg | Denmark | 6-12 August | |
| 19 | 1991 | Chalkidiki | Greece | 29 Sept. - 4 Oct. | |
| 20 | 1993 | Yogyakarta | Indonesia | 16-22 May | |
| 21 | 1996 | Montegrotto | Italy | 30 June-6 July | 544 |
| 22 | 1999 | New Delhi | India | 21-26 February | 517 |
| 23 | 2002 | Vancouver | Canada | 9-15 June | 460 |
| 24 | 2005 | Lillehammer | Norway | 12-17 June | 432 |
| 25 | 2008 | Vienna | Austria | 21-26 August | 431 |
| 26 | 2011 | Como | Italy | 26 Sept.- 2 Oct. | 465 |
| 27 | 2014 | Sydney | Australia | 10 - 16 October | 308 |
| 28 | 2017 | Denpasar, Bali | Indonesia | 9-14 October | 280 |
| 29 | 2022 | Brussels | Belgium | 22 - 27 February (online) | 44 delegates 26 Feb 50 delegates 27 Feb |
| 30 | 2024 | Granada | Spain | 17 - 22 September | 259 |