Congresses
| # | Place | Country | Continent/Region | Date | Participants |
| 1 | Rome | Italy | W-Europe | September 1966 | ? |
|---|---|---|---|---|---|
| 2 | Brighton | UK | W-Europe | May 1970 | 615 |
| 3 | Washington | USA | North-America | September 1973 | ? |
| 4 | Paris | France | W-Europe | April 1977 | 600 |
| 5 | Jerusalem | Israel | Asia | March 1980 | 585 |
| 6 | Berlin | Germany | W-Europe | May 1984 | 850 |
| 7 | Sydney | Australia | Australia | April 1988 | 700 |
| 8 | Montreal | Canada | North-America | May 1992 | 1200 |
| 9 | Vienna | Austria | W-Europe | April 1996 | 1300 |
| 10 | Hiroshima | Japan | Asia | 10-19 May 2000 | 1179 |
| 11 | Madrid | Spain | W-Europe | 23-28 May 2004 | 1307 |
| 12 | Buenos Aires | Argentina | S-America | 19-24 October 2008 | 1336 |
| 13 | Glasgow | UK | W-Europe | 13-18 May 2012 | 1789 |