Guy Lombardo
On November 5, 1977, Lombardo suffered a fatal heart attack. Another source says he died "of a lung ailment." His wife was at his bedside when he died in Houston Methodist Hospital.
Cardinal Lamberto
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 one outlined in David Yallop's 1984 book, "In God's Name", have suggested that Luciani was murdered because he was investigating and planning reforms for the Vatican Bank, in light of the Banco Ambrosiano scandal.