He was born in Mendrisio in 1943. He graduated from the University of Architecture in Venice, where he worked with Le Corbusier and Luis Kahn. He teaches and researches in Europe, Asia and America. Since 1982 he collaborates with Alias, for which he designs second and fifth, two of his most famous chairs, now exhibited at the MoMA. Award-winning architect has published several monographs, and founded the Swiss Academy of Architecture in 1996. He lives and works in Lugano.