Livio Castiglioni (1911-1979), architect and designer, was a member of one of the most influential dynasties of Italian design. He was in fact the eldest son of the sculptor Giannino Castiglioni, older brother of the more famous Pier Giacomo (1913-1968) and Achille (1918-2002). It was with his brother Pier Giacomo that he took his first steps in the world of architecture, associating with his fellow student Luigi Caccia Dominioni and forming a trio that designed radios for Phonola and cutlery now proposed by Alessi. He later decided to set up his own business, dealing mainly with lighting and technology: he therefore continued his collaboration with Phonola and also worked for over twenty years with Brionvega. He has worked with some of the best known Italian lamp brands, such as Artemide, FontanaArte and Stilnovo. In 1956, together with his brothers, he is one of the founding members of the Association for Industrial Drawings (ADI). Since 1972 he has been associated in a studio with his son Piero and intensified his interest in light design, signing the lighting projects for exhibitions, art galleries, shops and hotels.