Before the congresses started of there was preparatory meetings in Scheveningen Netherlands and in Zürich Switzerland.
Congress Logbook
Number, year, location and country. Hosting times is the number of times the country has acted as host for the congress.
| Number | Year | Location | Country | Hosting times | |
|---|---|---|---|---|---|
| 1 | 1951 | Paris | France | FR | 1 |
| 2 | 1952 | Kobenhavn | Denmark | DK | 1 |
| 3 | 1953 | Bad Homburg | Germany | DE | 1 |
| 4 | 1954 | Napoli | Italy | IT | 1 |
| 5 | 1955 | Noordwijk | Netherlands | NL | 1 |
| 6 | 1956 | Wien | Austria | AT | 1 |
| 7 | 1957 | Saltsjöbaden | Sweden | SE | 1 |
| 8 | 1958 | Oostende | Belgium | BE | 1 |
| 9 | 1959 | Madrid | Spain | ES | 1 |
| 10 | 1960 | Bürgenstock | Switzerland | CH | 1 |
| 11 | 1961 | Aix-en-Provence | France | FR | 2 |
| 12 | 1962 | Helsinki | Finland | FI | 1 |
| 13 | 1963 | Wiesbaden | Germany | DE | 2 |
| 14 | 1964 | Marienlyst | Denmark | DK | 2 |
| 15 | 1965 | Capri | Italy | IT | 2 |
| 16 | 1966 | Amsterdam | Netherlands | NL | 2 |
| 17 | 1967 | Interlaken | Switzerland | CH | 2 |
| 18 | 1968 | Innsbruck | Austria | AT | 2 |
| 21 | 1971 | Malmö | Sweden | SE | 2 |
| 22 | 1972 | Estoril | Portugal | PT | 1 |
| 23 | 1973 | Liège | Belgium | BE | 2 |
| 24 | 1974 | Harrogate | United Kingdom | GB | 1 |
| 25 | 1975 | Helsinki | Finland | FI | 2 |
| 26 | 1976 | Salzburg | Austria | AT | 3 |
| 27 | 1977 | Capri | Italy | IT | 3 |
| 28 | 1978 | München | Germany | DE | 3 |
| 29 | 1979 | Amsterdam | Netherlands | NL | 3 |
| 30 | 1980 | Montreux | Switzerland | CH | 3 |
| 31 | 1981 | Madrid | Spain | ES | 3 |
| 32 | 1982 | Eastbourne | United Kingdom | GB | 2 |
| 33 | 1983 | Kobenhavn | Denmark | DK | 3 |
| 34 | 1984 | Monte Carlo | France | FR | 4 |
| 35 | 1985 | Istanbul | Türkiye | TR | 1 |
| 36 | 1986 | Sandefjord | Norway | NO | 1 |
| 37 | 1987 | Pörtschach | Austria | AT | 4 |
| 38 | 1988 | Saariselkä | Finland | FI | 3 |
| 39 | 1989 | Capri | Italy | IT | 4 |
| 40 | 1990 | Würzburg | Germany | DE | 4 |
| 41 | 1991 | Visby | Sweden | SE | 3 |
| 42 | 1992 | Bern | Switzerland | CH | 4 |
| 43 | 1993 | Edinburgh | United Kingdom | GB | 3 |
| 44 | 1994 | Sevilla | Spain | ES | 4 |
| 45 | 1995 | Dublin | Ireland | EI | 1 |
| 46 | 1996 | Estoril | Portugal | PT | 2 |
| 47 | 1997 | Oslo | Norway | NO | 2 |
| 48 | 1998 | Linz | Austria | AT | 5 |
| 49 | 1999 | Ioannina | United Kingdom | GR | 1 |
| 50 | 2000 | Maastricht | Netherlands | NL | 4 |
| 51 | 2001 | Istanbul | Türkiye | TR | 2 |
| 52 | 2002 | Budapest | Hungary | HU | 1 |
| 53 | 2003 | Cannes | France | FR | 5 |
| 54 | 2004 | York | United Kingdom | GB | 4 |
| 55 | 2005 | Camogli | Italy | IT | 5 |
| 56 | 2006 | Naantali | Finland | FI | 4 |
| 57 | 2007 | Seattle | United States | US | 1 |
| 58 | 2008 | Lausanne | Switzerland | CH | 5 |
| 59 | 2009 | Dresden | Germany | DE | 5 |
| 60 | 2010 | Dubrovnik | Croatia | HR | 1 |
| 61 | 2011 | Stockholm | Sweden | SE | 4 |
| 62 | 2012 | Bilbao | Spain | ES | 5 |
| 63 | 2013 | Newport | United Kingdom | GB | 5 |
| 64 | 2014 | Utrecht | Netherlands | NL | 5 |
| 65 | 2015 | Krakow | Poland | PL | 1 |
| 66 | 2016 | Dublin | Ireland | EI | 2 |
| 68 | 2018 | Belgrade | Serbia | RS | 1 |
| 69 | 2019 | Braga | Portugal | PT | 3 |
| 70 | 2022 | Milan | Italy | IT | 6 |
| 71 | 2023 | Berlin | Germany | DE | 6 |
| 72 | 2024 | Ghent | Belgium | BE | 3 |
| 19 | 1969 | Ajaccio, Corse | France | FR | 2 |
| 20 | 1970 | Arenal, Mallorca | Spain | ES | 2 |
| 67 | 2017 | Ajaccio, Corsica | France | FR | 6 |