Enrico Baj was an Italian artist and writer on art. He created prints, sculptures but especially collage. He was close to the surrealist and dada movements, and was later associated with CoBrA. As an author he has been described as a leading promoter of the avant-garde. He worked with Umberto Eco among other collaborators.
Baj studied painting and law in Milan at the Accademia di Brera, 1945-1948. In 1951, he co-founded the movimento d’arte nucleare with Sergio Dangelo and Gianni Bertini to promote a style of gestural painting relevant to the post-War nuclear age. Baj and other Arte nucleare artists joined the Mouvement International pour une Bauhaus Imaginiste (MIBI) founded by Asger Jorn in 1955. At the same time he began producing collage and assemblage works.