“He was best known for two works: “Accidental Death of an Anarchist” (1970), a play based on the case of an Italian railroad worker who was either thrown or fell from the upper story of a Milan police station while being questioned on suspicion of terrorism, and for his one-man show “Mistero Buffo” (“Comic Mystery”), written in 1969 and frequently revised and updated over the next 30 years, taking wild comic aim at politics and especially religion.”