PCI Congresses
● 1st Congress – Livorno (21 January 1921)
● 2nd Congress – Rome (20–24 March 1922)
● 3rd Congress – Lyon (20–26 January 1926)
● 4th Congress – Cologne (14–21 April 1931)
● 5th Congress – Rome (29 December 1945 – 5 January 1946)
● 6th Congress – Milan (4–10 January 1948)
● 7th Congress – Rome (3–8 April 1951)
● 8th Congress – Rome (8–14 December 1956)
● 9th Congress – Rome (30 January – 4 February 1960)
● 10th Congress – Rome (2–8 December 1962)
● 11th Congress – Rome (25–31 January 1966)
● 12th Congress – Bologna (8–15 February 1969)
● 13th Congress – Milan (13–17 March 1972)
● 14th Congress – Rome (18–23 March 1975)
● 15th Congress – Rome (30 March – 3 April 1979)
● 16th Congress – Milan (2–6 March 1983)
● 17th Congress – Florence (9–13 April 1986)
● 18th Congress – Rome (18–22 March 1989)
● 19th Congress – Bologna (18–22 March 1990)
