The Congress - Livorno (1921)
II Congress - Rome (1922)
III Congress - Lyon (1926)
Fourth Meeting - Cologne (1931)
V Congress - Rome (1946)
VI Congress - Milan (1948)
VII Congresso - Roma (1951)
VIII Congresso - Roma (1956)
IX Congresso - Roma (1960)
X Congresso - Roma (1962)
XI Congresso - Roma (1966)
XII Congresso - Bologna (1969)
XIII Congresso - Milano (1972)
XIV Congresso - Roma (1975)
XV Congresso - Roma (1979)
XVI Congresso - Milano (1983)
XVII Congresso - Firenze (1986)
XVIII Congresso - Roma (1989)
XIX Congresso - Bologna (1990)
XX Congresso - Rimini (1991)
