The congresses are held every other year.
The next congress will be held in Tübingen, Germany, in August 2011 and will be organised by Nico Michiels.
1987 in Basel; organiser Stephen Stearns
1989 in Rome; organiser Valerio Sbordoni
1991 in Debrecen; organiser Gabor Vida
1993 in Montpellier; organiser François Catzeflis
1995 in Edinburgh; organiser Nick Barton
1997 in Arnhem; organiser Jos van Damme
1999 in Barcelona; organiser Antionio Fontdevilla
2001 in Århus; organiser Volker Loeschcke
2003 in Leeds; organiser Roger Butlin
2005 in Krakow; organiser Jan Kozlowski
2007 in Uppsala; organiser Jacob Höglund
2009 in Torino; organisers Cristina Lorenzi and Gabriella Sella