From 1984 to 2005 he was professor of history of contemporary art at the Università degli Studi di Siena, and director of the school of specialisation in art history. He taught at the Accademia di Belle Arti in Rome (1966–1973) and at the Università degli Studi di Salerno (1973–1984). He was author of the "catalogues raisonnés" of the works of Enrico Baj, Lucio Fontana and Renato Guttuso.