Pisa 1865-Rapallo 1937. An eminent jurist, founder of modern Italian commercial law, professor of Commercial Law in Macerata, Parma and Turin. Rector of Bocconi University from 1919 to 1926. An antifascist (his son Piero was a talented Marxist economist, a friend of Gramsci but also of Mattioli, given the professorship by his father), he was attacked in front of the university in 1922, receiving an apology from Mussolini. The episode led him to abandon the rectorship. Member of the Accademia dei Lincei, founder and director of the Rivista del diritto commerciale.