Achille Castiglioni combined architecture, exhibition design and industrial objects, often in close collaboration with his brother Pier Giacomo. Arco and Mezzadro show their shared authorship; after 1968, Achille continued his practice and taught design in Turin and Milan.
Milan and architecture
A shared studio, then a solo practice
From 1945, Achille worked with his brother Pier Giacomo in the Milan studio; their collaboration continued until Pier Giacomo’s death in 1968. Achille Castiglioni experimented with industrial products with his brothers from 1940 and continued independently at the studio through 2002.1
Arco: a light from above without a ceiling fixture
Designed with Pier Giacomo in 1962, Arco addresses the need to illuminate a table without fixing a light to the ceiling. A steel arch rises from a marble base and projects the light source outward over the table.3
Mezzadro and the shared authorship
Teaching through objects
Two solutions by two brothers
Arco and Mezzadro make the shared authorship of Achille and Pier Giacomo Castiglioni visible through two different problems. Arco projects a light over a table without a ceiling suspension: the long metal curve carries the source away from a marble counterweight. Mezzadro takes the form of a sprung tractor seat into a domestic stool. The current Mezzadro has a chromed steel stem and a steamed-beech base. The lamp directs light across space. The stool changes the context of an existing seat form. Neither should be presented as Achille’s solo invention, and neither is explained by a generic “playful design” caption.7,8

