Avant-garde poet, historian and art theorist, Carl Einstein (1885-1940) was a cultural actor between France and Germany as well as co-founder of Documents (1929), together with George Bataille, Michel Leiris, Georges Wildenstein and George-Henri Riviere. He was part of Daniel-Henry Kahnweiler’s circle and kept friendship with Picasso, Braque, Gris and Léger. His understanding of Cubism as a process beyond painting, his approach of art history as the struggle of optical experiences, invented spaces figurations, his reformulation of concepts deeply rooted in the German tradition are some of the aspects that characterize the originality of his thought. On one hand, the Cubist proposal does not imply a representation of the object, but a visual and mental process undergone by both the artist and the observer where the object is the result of this dual process. On the other, an engagement with language drove Einstein to end his Georges Braque (1934) with the phrase myth was reintegrated to the Real, and poetry becomes the originating element of reality. Restoring myth as a means for the creation of reality, and poiesis, an action that transforms and gives sense to the world, are the alternatives introduced by Carl Einstein into an art, and art history, which does not consider objects as reflection of an outside world but as creators of the outer world of men. This dissertation follows and analyzes Einsteins relationship with the discipline known as Kunstwissenschaft and the transformations to which he submitted some of its concepts in order to understand the singularity of his thought.