Achille e Pier Giacomo Castiglioni

Achille Castiglioni (1918–2002) and his elder brother Pier Giacomo (1913–1968) were Milanese architects and designers whose work helped shape post-war Italian lighting and furniture.

Two men in suits standing in an office setting

They shared a curiosity about how ordinary things were made, and a sense of humour that could turn a tractor seat into something you might pull up to the table. 

Pier Giacomo established his practice in Milan alongside their eldest brother, Livio. Achille joined them in 1944 after graduating in architecture from the Politecnico di Milano.

When Livio left the studio in 1952, Achille and Pier Giacomo continued to work together across architecture, exhibition design and objects for the home. 

Iconic Designs

The Arco floor lamp (1962), designed for Flos, began with a domestic question. How do you light a dining table from above without fixing a pendant to the ceiling? A sweeping steel arm carries the shade over the table, while a block of Carrara marble anchors it well away from the chairs. Even the hole in the marble has a purpose. Slip a broom handle through it and two people can lift the base. 

Their Gatto table lamp (1960) for Flos takes shape around a fine steel frame. A sprayed cocoon resin softens the light while leaving the outline of each rib visible. In furniture, the Mezzadro stool (1957), later produced by Zanotta, shows their eye for an object already well designed for its purpose.

The curved metal seat came directly from a tractor. 

Legacy

The brothers’ partnership lasted until Pier Giacomo’s death in 1968.

Achille continued to design and teach, bringing everyday objects into his lectures so students could examine the ingenuity of a hinge, a grip or a fastening.

Today, their Mezzadro belongs to the collection of New York’s Museum of Modern Art. Their cocoon lamps hold a particular place at Lumini Collections, where the sculptural quality of Italian lighting is a recurring theme.