In 1965 , he was one of the lecturers at a conference about revolutionary war held at the Hotel " Parco dei Principi " in Rome , which was organized by Fascist politician Pino Rauti and his Ordine Nuovo organization . He was later questioned by the court about the Piazza Fontana bombing . As his lecture was thought to have been devised and used to plan a general " strategy of tension " to destabilize Italian democratic system , and due to one of his students , Delfo Zorzi , being enquired for material responsibility . However inquiries proved that he was not involved in any way
Piazza Fontana bombing
Piazza Fontana bombing
Pio Filippani Ronconi