2024 ISOO Virtual

2023 ISOO Africa

2022 Leiden, The Netherlands

2019 Los Angeles, USA

2017 Sydney, Australia

2015 Paris, France

2013 Cleveland USA

2011 Buenos Aires Argentina

2009 Cambridge England

2007 Siena Italy

2005 Whistler Canada

2004 Hyderabad India

2001 Amsterdam The Netherlands

1999 Philadelphia USA

1997 Jerusalem Israel

1994 Florence Italy

1992 New York City USA

1989 Essen Germany

1987 Zusdel/Moscow Russia

1984 Nyon Switzerland

1981 Schwerin East Germany

1977 Cambridge England