Achille Castiglioni was born in Milan in 1918.He and brothers Livio (1911-1979) and Pier Giacomo (1913-1968) showed an early interest in industrial production. Achille went on to study architecture and became interested in the idea of developing a complete design process after graduating in 1944. Achille later joined the design practice founded by his brothers. Livio Castiglioni left the practice in 1952 and the remaining two brothers worked as a team until Pier Giacomo died in 1968. Designs by the creative duo were instrumental in defining the playful intelligence for which Italian design was known in the latter half of the 20th century.