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Architects and product designers Achille, Livio, and Pier Giacomo were born and worked in Milan. Their designs are often ingenious adaptations of everyday and found objects. After graduating from Milan Polytechnic, the three brothers established a studio in 1944 with Luigi Caccia Dominioni. In 1952, Livio left the firm to work independently. The Mezzadro and Sella stools (both 1957) were, respectively, developed from ready-made tractor and bicycle seats and are telling examples of the Castiglionis’ material insight. They established enduring relationships with a series of design-conscious clients, in particular lighting manufacturer Flos.
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