(b. 1931, Florence; d. 1982, Milan) was an art critic and feminist activist best known for her work with Rivolta Femminile, a feminist collective created in 1970. Following the publication of Autoritratto ('Self-portrait') in 1969, Lonzi published Manifesto di Rivolta femminile (1970), Sputiamo su Hegel. La donna clitoridea e la donna vaginale e altri scritti (1974) and Taci, anzi parla. Diario di una femminista (1977). Due to her uncodified practice, she occupies a singular position within post-war Italian politics and art, and is a crucial figure of European feminism.