Ça ira - Il fiume della rivolta (1964)

Ça ira - Il fiume della rivolta, also released internationally as Thermidor, is an Italian collage film of documentary film and drama film genres directed by Tinto Brass. Taking its name from the popular revolutionary song Ça ira, the film is a critical narrative of 20th century revolutions from 1900 to 1962 and their legacy.

More at Wikipedia.