Anna Castelli Ferrieri (1918–2006) was an influential Italian architect and industrial designer, renowned for her pioneering use of plastics in furniture design. Graduating from the Milan Polytechnic Institute in 1943, she co-founded Kartell in 1949 with her husband, Giulio Castelli. As Kartell's design director, she created iconic pieces like the modular Componibili storage units, exemplifying her commitment to functional, minimalist aesthetics. Her work significantly impacted post-war Italian modern design, blending technological innovation with everyday practicality. Throughout her career, Castelli Ferrieri received numerous accolades, including multiple Compasso d'Oro awards, and remained active in design education and advocacy.