Cardinal Lamberto left Rome with a large sum of money and several documents. Fearing that their corruption will be exposed, Keinszig, Lucchesi, and Gilday plot to murder the Pope. Gilday poisons the pontiff's tea, killing him in his sleep. The character of Lamberto and the film's depiction of the events which led to his murder are based upon one of the conspiracy theories surrounding the sudden death of the real-life Pope John Paul I, Albino Luciani. Like the Lamberto character, Luciani was discovered dead in his bed in 1978, 33 days after his election to the papacy. Various theories, such as the
Pope Constantine both occasions. Constantine's predecessor Pope Sisinnius, a Syrian, was pope for only twenty days. Constantine became pope in March 708, less than two months later. Constantine was one of the many Greek popes of the Byzantine Papacy, the period during which Rome was under the rule of the Byzantine Empire and popes required the approval of the emperor for consecration as pope. The defining issue of the papacy at the time of Constantine's election was the Western rejection of the Trullan canons of the Quinisext Council. Pope John VII had been sent the canons for approval and instead had sent