Gianni Colombo (Milan, 1937–1993) was an Italian artist and a pioneer of kinetic and environmental art. He initially worked on abstract sculpture and informal painting before joining Davide Boriani, Gabriele De Vecchi, Giovanni Anceschi, and Grazia Varisco to found Gruppo T in 1959. The group, along with Gruppo N, aimed to explore the interaction of light, space, and movement through dynamic works. Colombo participated in many significant exhibitions, including the 1968 Venice Biennale, where he won the first prize for painting.
His works, such as the "Strutturazioni elastiche" (Elastic Structures) or the "Spazio Elastico", have become part of major museum collections, including those of the Centre Pompidou, MoMA in New York, and MAXXI in Rome. In the 1970s, he expanded his research by creating installations that actively involved the viewer, making perceptually unstable environments.