1955
His friend, architect-designer Valentino Cai, signs him up for the III Bienal de São Paulo (MAM-SP); of the three artworks submitted, two are accepted: Sequência de Curvas and Composição Vertical I, both from 1953. The critics classify Fiaminghi’s work as concretist.
He meets Luiz Sacilotto, who invites him to participate in the meetings of the group of concrete artists of São Paulo, at Clubinho dos Artistas, on which occasion he is introduced to the others members: Waldemar Cordeiro, Kazmer Féjer, Maurício Nogueira Lima and Judith Lauand. He also meets the brothers and concrete poets Augusto and Haroldo de Campos. Mário Schenberg introduces him to Alfredo Volpi.
Participates in the IV Salão Paulista de Arte Moderna, at Galeria Prestes Maia (SP), receiving the silver medal for the work Elevação Vertical com Movimento Horizontal (1955).
Begins his research on corluz [colorlight] lattices, producing photographic slides.