Papini (p. 71) points out that it is only known that Pope Gregory I (590–604) asked the Bishop of Clusium to investigate the life and acts of the deacon Ioannes, who had been selected by Ansfrid and the inhabitants of castrum Balneum regis to be their bishop; there is nothing known about the bishop's investigation or whether the pope approved the choice. Cappelletti, pp. 588-589. Kehr, p. 216 no. 2. Francesco Lanzoni (1927), Le diocesi d'Italia dalle origini al principio del secolo VII (an. 604). (in Italian) Faenza: F. Lega, p. 544.
Following the death of Bishop Simon, three Canons acting in the name of the entire Chapter elected the Franciscan friar, Matheus de Castro as bishop. On his refusal, Pope Boniface VIII on 21 January 1297 appointed the Dominican Stephanus Tasche. Bishop Stephanus died in 1306. Antoine Thomas, Les registres de Boniface VIII Tome I (Paris: Ernest Thorin 1884), p. 557 no. 1534. Ughelli, p. 515 (with the wrong year). Papini, p. 74.
Since Bishop Simon had died in Avignon, and since Pope John XXII had reserved to himself all episcopal appointments in Christendom, he appointed Tramus (or Beltramus) Monaldeschi Bishop of Bagnorea on 12 February 1327. On 5 October 1328 Monaldeschi was transferred to the diocese of Orvieto. He died on 23 September 1345. G. Mollat, Jean XXII: Lettres communes Tome septième (Paris: E. de Boccard 1919), p. 89, no. 30584. Papini, p. 75. Eubel I, p. 126, 508.
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Umberto Baglioni, "Bagnorea", in: The Catholic Encyclopedia. Vol. II. New York: Universal Knowledge Foundation. 1913. p. 203.
Bishop Romanus was a supporter of the antipope Anastasius. Along with Bishop Arsenius of Orte entered the Lateran Basilica and removed Pope Benedict III (855–858) from his throne, stripped him of his vestments, and beat him. Louis Duchesne (1892). Le Liber Pontificalis (in Latin and French). Vol. Tome II. Paris: E. Thorin. p. 142. Ughelli, p. 515. Papini, p. 72.
Bishop Marsilius had supported the Emperor Frederick Barbarossa and his schismatic antipopes under Pope Alexander III (1059–1081). He was present at Venice, when the Emperor and the Pope made peace in 1077, and he begged for absolution. Antonio Rossi (ed.) La cronaca veneta, detta Altinate, in: Archivio storico italiano (in Italian and Latin). Vol. VIII. Firenze: G.P. Vieusseux. 1845. p. 179.
Simon had been a Canon of Bagnoregio. He was elected by the four Canons who were present at the electoral meeting, and his confirmation was sought from the pope by two of the Canons. After examination of the canonical validity of the election and the suitability of the bishop-elect by a committee of three cardinals, Simon was confirmed as Bishop of Bagnoregio by Pope Gregory X on 30 August 1272. Jean Guiraud (1898). Les registres de Grégoire X (1272-1276) (in Latin). Paris: Thorin & fils. pp. 16, no. 54. Eubel Hierarchia catholica I, p. 126. Papini, p. 74.
In electing a successor to Bishop Stephanus, the Chapter split into two factions; one chose Simon, a Canon of Florence, while the other chose the Franciscan Monaldus of Orvieto. The election was referred to the pope, where a committee of three cardinals examined the matter thoroughly. On 9 July 1306, Pope Clement V appointed Simon. Bishop Simon died at the Roman Curia in Avignon, in 1327. Luigi Tosti; Others (1885). Regestum Clementis papae V (in Latin). Vol. I. Rome: ex Typographia Vaticana. pp. 219, no. 1162. Eubel I, p. 126. Papini, p. 75.
A native of Monteluongo di Pontremoli, Rosa was Provost of Bagnone when he was appointed Bishop of Bagnoregio by Pope Pius XII on 23 June 1942. Bishop Rosa had reached the age of eighty-seven when he was assigned an Apostolic Administrator on 8 June 1970. He died on 3 October 1971. Papini, pp. 90-91. David M. Cheney, Catholic-hierarchy.org, "Bishop Luigi Rosa"; retrieved: 11 May 2019.[self-published source]
Boccadoro was appointed Bishop of Viterbo e Tuscania and Apostolic Administrator of Bagnoregio on the same day, 8 June 1970. David M. Cheney, Catholic-hierarchy.org, "Bishop Luigi Boccadoro"; retrieved: 11 May 2019.[self-published source]
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A bishop of Bagnoregio took part in the Lateran Council of 769, but his name has been effaced from the manuscript. He is called "Radoino" by Papini (p. 71). J. D. Mansi (ed.), Sacrorum Conciliorum nova et amplissima collectio, editio novissima, Tomus XII (Florence: A. Zatta 1766), p. 715. Gams, p. 670 column 1: "Cujus nomen C. Cenni eruere non potuit."
Bishop Alifredo was present at the Roman synod of Pope Eugenius II on 15 November 826. J. D. Mansi, Sacrorum Concilium nova et amplissima collectio, editio novissima, Tomus XIV (Venice: A. Zatta 1769), p. 999. Gams, p. 670. Papini, p. 71.
Bishop Leo attended the Roman synod of Pope Leo IV on 8 December 853. Mansi, Tomus XIV, p. 1020.
Bishop Joannes attended the second Roman synod of Pope Benedict VIII on 3 January 1015. Mansi, Tomus XIX (Venice 1774), p. 363.
Bishop Ingo attended the Roman council of Pope Nicholas II on 13 April 1059. Mansi, Tomus XIX (Venice 1774), pp. 912 and 920 (in another subscription list, p. 911, he is called Isidorus). Schwartz, p. 255 with note 1. Papini, p. 72.
