Born in 1930, Castelmassa, Italy; died in 2017 in Castelmassa, Italy.
In 1959, he founded the journal Azimuth and the gallery Azimut with Piero Manzoni. In the same year he also created his first shaped canvas, probing the potential of the surface of highly-taut canvases. He participated at Venice Biennale in 1964, 1966 (with a personal room), 1984 and 2003. In 1981, he exhibited at L’art en Italie depuis 1959 at the Centre Georges Pompidou in Paris. In 2001, he held an exhibition, curated by Germano Celant, at the Fondazione Prada in Milan. In 2010, he received the Praemium Imperiale for painting, considered the most important artistic recognition at an international level, from Prince Hitachi, from the Japan Art Association.