| 31 | 2018 | 🇬🇧 | Glasgow |
| 30 | 2016 | 🇨🇦 | Victoria |
| 29 | 2014 | 🇨🇳 | Xi’an |
| 28 | 2012 | 🇪🇸 | Zaragoza |
| 27 | 2010 | 🇺🇸 | Pacific Grove |
| 26 | 2008 | 🇯🇵 | Kyoto |
| 25 | 2006 | 🇷🇺 | Saint Petersburg |
| 24 | 2004 | 🇮🇹 | Bari |
| 23 | 2002 | 🇨🇦 | Whistler |
| 22 | 2000 | 🇦🇺 | Sydney |
| 21 | 1998 | 🇫🇷 | Marseilles |
| 20 | 1996 | 🇨🇳 | Beijing |
| 19 | 1994 | 🇬🇧 | Oxford |
| 18 | 1992 | 🇨🇦 | Vancouver |
| 17 | 1990 | 🇩🇪 | Aachen |
| 16 | 1988 | 🇺🇸 | Pasadena |
| 15 | 1986 | 🇮🇹 | Grado |
| 14 | 1984 | 🇯🇵 | Tsukuba |
| 13 | 1982 | 🇷🇺 | Novosibirsk |
| 12 | 1980 | 🇺🇸 | Charlottesville |
| 11 | 1978 | 🇫🇷 | Cannes |
| 10 | 1976 | 🇺🇸 | Aspen |
| 9 | 1974 | 🇩🇪 | Göttingen |
| 8 | 1972 | 🇺🇸 | Stanford |
| 7 | 1970 | 🇮🇹 | Pisa |
| 6 | 1968 | 🇺🇸 | Cambridge |
| 5 | 1966 | 🇬🇧 | Oxford |
| 4 | 1964 | 🇨🇦 | Toronto |
| 3 | 1962 | 🇫🇷 | Paris |
| 2 | 1960 | 🇺🇸 | Berkeley |
| 1 | 1958 | 🇫🇷 | Nice |
International Symposium