Bernardo Provenzano (; 31 January 1933 – 13 July 2016) was an Italian mobster and chief of the Sicilian Mafia clan known as the Corleonesi, a Mafia faction that originated in the town of Corleone, and de facto "il capo dei capi" (the boss of bosses). His nickname was "Binnu u tratturi" (Sicilian for "Bernardo the tractor") because, in the words of one informant, "he mows people down." Another nickname was "il ragioniere" ("the accountant") due to his apparently subtle and low-key approach to running his crime empire, at least in contrast to some of his more violent predecessors.