An Englishman, Richard Palmer was a friend of King William I and King William II of Sicily. Though appointed c. 1156, he was still bishop-elect in 1169. In April 1169, he was summoned by Pope Alexander III, who was at Benevento, and consecrated a bishop by the Pope personally; he was invested with the pallium, and it was announced that the archdiocese of Syracuse was thenceforth subject only to the Pope as its metropolitan. Palmer was transferred to the diocese of Messina by January 1183. Pirro, pp. 621–624. Sidney Lee (ed.), Dictionary of National Biography, Volume 43 (London: Macmillan 1895), pp. 146–148. Kamp, pg. 1234.
Gregory consecrated the Patriarch Photios I of Constantinople. He was transferred by the Patriarch Photios to the See of Nicaea (Turkey). Pirro, pg. 612, column 1. Gams, p. 954. Hans-Georg Beck, in: Hubert Jedin; John Patrick Dolan (1969). Handbook of Church History. Vol. III. London: Burns & Oates. pp. 175–176.
Trigona was a member of the family of the Marchesi di Conio e Foresta, barons of Imbaccari and a priest of the diocese of Catania. He was born in Piazza (diocese of Catania) in 1735 and died on 2 January 1824. Annuario pontificio [Notizie per l'anno M.DCCC.XXII] (in Italian). Rome: Cracas. 1822. p. 320.
A native of Aragon, Paolo de Santafe had been a Canon of Bordeaux and Auditor (judge) of the Rota and Sedis Apostolicae Referendarius in the Roman Curia for twelve years. He was a councilor of King Alfonso of Spain, who preferred him to the bishopric of Syracuse. He was consecrated a bishop by Pope Nicholas Von 17 March 1447. Pirro, pp. 632–634. Eubel, II, pg. 244.