1916, Zurich: "A line of poetry is a chance to get rid of all the filth that clings to this accursed language," Ball exclaimed. "I want the word where it ends and begins," he cried. "Dada is the heart of words." (That was "The First Dada Manifesto," July 14, 1916). The Cabaret Voltaire. Zurich.
1924: André Breton publishes the surrealist manifesto
1957 - Potlatch #29. Foundation of the Situationist International by Guy Debord at Cosio d'Arroscia. Publication of Fin de Copenhague with Asger Jorn (Imaginist Bauhaus). Report on the Construction of Situations and on the Conditions for Organization and Action of the Situationist International Tendency (internal S.I. document).