1920, Hollywood is launched! American production is now a must: detective films, melodramas or comedy series feature real stars. Charles Pathé, a pioneer in French cinema, create in his side his own model. He chose to produce episode films, adapted from literature, where adventure animates heroes. "Les Trois Mousquetaires" or "Les Misérables" are thus reviving a popular cinema. These commercial films do not prevent directors from working at the beginning of the Seventh Art. Abel Gance or Germaine Dulac create scenarios specially designed for the screen. They seek new forms of narrative, experiment with framing, create rhythms, depict the emotions of the characters through editing. Posters, photographs, accessories and advertising materials, film clips tell how each of these approaches reinvented film writing in the 1920s, giving rise to the Seventh Art, and the permeability between two approaches, those of commercial production and those of the search for a new cinematographic grammar.