Visual artist. In 1955, he moves to Rio de Janeiro. He takes up painting in 1965 and, in 1967, he takes classes at the National School of Fine Arts of the Federal University of Rio de Janeiro. In 1969, he begins to create the Situations—works of great impact, made with ephemeral and precarious materials such as garbage, toilet paper, human waste and rotting flesh (such as the Bloody Bundles), with which he performs interventions in the urban space. In the same year, he writes a manifesto in which he challenges traditional categories of art and their relationship with the market, and the social and political situation in Latin America. Barrio documents these situations through photography, artist’s notebooks and Super 8 films. His work, which also includes installations and sculptures, renounces a purely formal or contemplative aesthetic by making garbage, scrap, the perishing of the organic and the ephemerality of the gesture the material capable of revealing a radical and contestatory dimension of reality. Since the mid-1990s, various publications and exhibitions have sought to recover his work. He lives and works in Rio de Janeiro.