An often overlooked but important figure in the history of design is that of product/furniture designer Achille Castiglioni (1918-2002) in Milan where Massimo Vignelli first started working at age 16.

DesignMuseum.org:

One of the most important industrial designers of the 20th century, ACHILLE CASTIGLIONI (1918-2002) produced more than 150 products during his career and forged enduring relationships with Italian manufacturers such as Flos in lighting, Zanotta in furniture and Alessi in home products.

Achille, Pier Giacomo, and Livio Castiglioni working in their Milan studio, 1952

RR 126 stereo, 1965
Achille and Pier Giacomo Castiglioni
Manufactured by Brionvega

Arco floor lamp, 1962
Achille and Pier Giacomo Castiglioni
Manufactured by Flos

Spirale ashtray, 1971
Achille Castiglioni
Manufactured by Alessi

via designmuseum.org