Begins to work at the Museu Nacional as technical assistant to José Oiticica Filho.
Continues to work on the Série Invenções [Inventions Series] (1959-1962) and Núcleos [Nuclei], initiates his Relevos Espaciais [Spatial Reliefs] (1960) and begins to conceptualize his spectator participation projects and makes Penetrable PN1
Shows: August – IX Salão Nacional de Arte Moderna [8th National Exhibition of Modern Art], Museu Nacional de Belas Artes, Rio de Janeiro; November 21 – II Exposição Neoconcreta, Ministério da Educação, Rio de Janeiro; “Konkrete Kunst” [Concrete Art], organized by Max Bill, at the Zurich Helm Haus, Zurich.
Writings: November 26 – “Cor, Tempo, Estrutura.” Jornal do Brasil (SDJB) [Rio de Janeiro]. doc. nº 0015/60. AHO/PHO.