2004 — Budapest, Hungary
2000 — Montevideo, Uruguay
1996 — Copenhagen, Denmark
1992 — Montreal, Canada
1988 — Leningrad, USSR (former)
1985 — Athens, Greece
1982 — Paris, France
1979 — Budapest, Hungary
1976 — Vienna, Austria
1973 — Stockholm, Sweden
1970 — Amsterdam, the Netherlands
1967 — Prague, Czechoslovakia (former)
1964 — Mexico City, Mexico
1961 — Paris, France
1960 — Copenhagen, Denmark
1958 — Geneva, Switzerland
1956 — Brussels, Belgium
1954 — Venice, Italy
1952 — London, United Kingdom
1951 — Paris, France (preparatory Congress)
