 The Florentine chronicler Giovanni Villani, who was biased against the Orsini because of the legation of Napoleone Orsini to Florence in 1306, supports the allegation.The "Rebellamentu" covers John's negotiations with the Byzantine emperor Michael VIII Palaeologus and with Peter III of Aragon, the Sicilian Vespers, the coronation of Peter in Palermo in August 1282, the retreat of Charles to Calabria, and the entry of Peter and John into Messina in October 1282.The excerpt below describes how Peter was crowned by the Bishop of Cefalù because the incumbent of the Archdiocese of Palermo, Piero II de Santa Fede, had recently died, and the Archbishop of Monreale, Giovanni Roccamezza, was away in Rome