Isidore Isou was a Romanian-born French writer, poet, and filmmaker, best known for founding the Lettrism movement in the 1940s. This avant-garde movement emphasized the importance of letters and language in art, challenging traditional forms of literature and visual expression. Isou's work often explored the relationship between words and meaning, pushing the boundaries of artistic creation. In addition to his literary contributions, Isou was also a filmmaker, creating experimental films that reflected his innovative ideas. His most notable film, Traité de bave et d'éternité, released in 1951, is considered a landmark in the history of avant-garde cinema. Isou's influence extended beyond his lifetime, impacting various artistic movements and inspiring future generations of artists.