- I London, U.K. 1964
- II London, U.K. 1969
- III Zagreb, Yugoslavia 1970
- IV Jerusalem, Israel 1972
- V Athens, Greece 1974
- VI Opatija, Yugoslavia 1976
- VII Lisbon, Portugal 1978
- VIII Zagreb, Yugoslavia 1981
- IX Paris, France 1982
- X Osaka, Japan 1983
- XI Rio de Janeiro, Brazil 1986
- XII Washington, D.C., U.S.A. 1990
- XIII New Delhi, India 1992
- XIV Hamburg, Germany 1994
- XV Rome, Italy 1995
- XVI Vancouver, Canada 1998
- XVII Agra, India 2001
- XVIII Kobe, Japan 2004
- XIX Prague, Czech Republic 2007
- XX WASP Congress 2010, Marrakech, Morroco
- XXI WASP Congress, 2013, Lisbon, Portugal
- XXII WASP Congress, 2016, New Delhi, India
- XXIII WASP Congress, 2019, Bucharest, Romania
