Pier Giacomo Castiglioni was born in Milan in 1913. He studied architecture at the Politecnico di Milano and graduated in 1937. In 1944, he would design the university’s official signet. After graduation, he established an architectural practice with his brother Livio. Youngest brother Achille joined in 1944. The practice focused predominantly on exhibition and product design as well as a number of architectural projects. The three brothers worked together until Livio left the practice in 1952. Pier Giacomo and Achille would collaborate for the rest of Pier Giacomo’s life and were internationally recognised as pioneers of Italian design.