[2] Much of their work was in product and exhibition design, but they also carried out a number of architectural projects,[5] including the reconstruction in 1952–53 of the Palazzo della Permanente [it], which had been destroyed by bombing in 1943.

[1][2] Products designed by the Castiglioni brothers in the post-war years included the "Turbino",[6] "Luminator",[7] "Toio",[8] and "Arco" lamps for Flos [it], the "Spalter" vacuum cleaner,[9] and a number of audio devices for Brionvega including the RR 126 [it] radiogram.

[10] Working alone,[citation needed] Pier Giacomo designed the "Mezzadro" stool for Zanotta based Marcel Duchamp's concept of "ready made".

[3] In 1956 he was one of the founding members of the Associazione per il Disegno Industriale (ADI) in Milan and also taught life drawing at the Politecnico di Milano from 1964 to 1968.

They were the Castiglioni, like their work, indivisible fruit of the same research, of the same passion, of a great ability to transform the world around us into a new memorable gesture.