The diocese of Bagnoregio is a former Roman Catholic territory in Lazio, Italy.
According to tradition, St. Ansanus preached the Gospel here in the third century and the church of Santa Maria delle Carceri outside the Alban Gate was said to have been built above the prison in which he was confined. There are no records as to the date of the erection of the diocese but a letter of Pope St. Gregory the Great is authority for the statement that about the year 600 the newly elected deacon John was appointed bishop of Bagnoregio, the earliest extant mention of a bishop of the see, but he was doubtlessly not the first bishop.
The diocese grew over the centuries, gaining terrotories around 90 from the dioceses of Perugia and Orvieto and incorporating in 1015 what had been the Roman Catholic Diocese of Bomarzo.
Up to the time of pope Urban V, Montefiascone was part of the Diocese of Bagnorea (Bagnoregio's Latin name), but was made by this pontiff the seat of a new diocese. Ferdinando Ughelli, without any documentary proof, claims the Diocese of Bagnorea was joined to the Diocese of Viterbo on 4 February 1449, but neglects to mention when they were reestablished as separate dioceses.
After an earthquake in 1695, the cathedral that had been in Civita di Bagnoregio was replaced by one at Bagnoregio itself.
On September 30, 1986 it was one of several former bishoprics to be suppressed and merged into the neighbouring Diocese of Viterbo e Tuscania, that of Viterbo, by whose bishop it was already administered since the death of the last diocesan bishop of Bagnoregio in 1971. The merged bishopric then took the name of Diocese of Viterbo, Acquapendente, Bagnoregio, Montefiascone, Tuscania and San Martino al Monte Cimino, in 1991 again shortened to Bishopric of Viterbo.
Aldualdo (861? – 868?)
Rustico (1255 – death 1270)
Simone (1272.08.30 – death 1295)
Stefano Tasca, Dominicans (O.P.) (1297.01.21 – death 1306)
Simone (1306.07.09 – ?)
Beltramo Monaldeschi, O.P. (1327.12.02 – 1328.10.05), later Bishop of Orvieto (Italy) (1328.10.05 – death 1345.09.23)
Matteo di Castelpietro, Friars Minor (O.F.M.) (1328.10.05 – 1342.12.20), later Bishop of Acerra (Italy) (1342.12.20 – 1344)
Giovanni, O.F.M. (1342.12.20 – ?), previously Bishop of Acerra (Italy) (1332 – 1342.12.20)
Giovanni da Civita Castellana (1348.12.14 – ?)
Alamanno da Montefiascone (1357.11.29 – ?)
Bonaventura Vanni, O.F.M. (1363.07.24 – ?)
Matteo degli Avveduti, O.F.M. (1383.04.05 – 1399.10.06), later Bishop of Orvieto (Italy) (1399.10.06 – 1409)
Angelo (1399.11.05 – ?)
Angelo (1409.12.20 – ?)
Benedetto Paconati, O.P. (1438.01.10 – death 1445), previously Bishop of Ario (Greece) (1434.09.22 – 1438.01.10)
Corrado da Matelica, O.F.M. (1445.09.26 – 1446)
Niccolò Ruggeri, O.F.M. (1446.05.27 – 1449)
Agostino da Bagnoregio, Augustinians (O.E.S.A.) (1449.10.17 – death 1459)
Filippo Landolfi (1459.09.05 – ?)
Angelo Pisani (1462.04.26 – 1475)
Pietro Bocca (1475.11.06 – death 1483 or 1487)
Antonio da San Gimignano (1488.05.21 – death 1497)
Bartolomé Martí Apostolic Administrator (1497.03.02 – 1500.03.25), Cardinal-Priest of S. Agata alla Suburra (pro hac vice title)
Ferdinando Castiglia (1500.05.04 – death 1521)
Corrado Manili (1521.09.20 – death 1522)
Ugo de Spina (1522.12.10 – death 1523)
Giovanni Mercurio de Vipera (1523.03.23 – death 1527.05.26)
Francisco de Solís Quiñones y Montenegro, Military Order of Saint James of the Sword (O.S.) (1528.01.24 – death 1545))
Nicolò Vernely (1545.05.22 – 1563)
Galeazzo Gegald (1563.10.15 – 1568)
Umberto Locati, O.P. (1568.04.05 – death 1587)
Tommaso Sperandio Corbelli (1574.03.10 – death 1590), previously Bishop of Traù (1567.04.18 – 1574.03.10)
Francesco Serini (1590.07.16 – 1598.09.06)
Carlo Trotti (1598.10.09 – 1611)
Lelio Ruini (22 Oct 1612 - 31 Dec 1621 Died)
Carlo Bovi (10 Jan 1622 - 29 Jan 1635 Appointed, Bishop of Sarsina)
Pietro Paolo Febei (9 Jul 1635 - 4 Aug 1649 Died)
Carlo Azzolini (9 Dec 1649 - 1653 Resigned)
Vincenzo Candiotti (18 Aug 1653 - 21 Jan 1680 Died)
Giovanni Paolo Meniconi (29 Apr 1680 - 24 Dec 1694 Died)
Vincentius degl'Atti (24 Jan 1695 - 2 Jan 1696 Appointed, Bishop of Orvieto)
Uldericus Nardi (21 Jul 1698 - 17 Apr 1705 Died)
Onofrio Elisei (8 Jun 1705 - 10 Sep 1721 Appointed, Bishop of Orvieto)
Onofrio Pini (24 Sep 1721 - Jun 1754 Died)
Ubaldo Baldassini, B. (16 Sep 1754 - 9 Apr 1764 Appointed, Bishop of Jesi)
Giuseppe Aluffi (11 May 1764 - 27 Feb 1789 Resigned)
Martino Cordella (30 Mar 1789 - 7 Jan 1812 Died)
Giovanni Battista Iacobini (26 Sep 1814 - 9 Jun 1832 Died)
Luigi Carsidoni (2 Jul 1832 - 29 Jul 1833 Appointed, Bishop of Fano)
Gaetano Baluffi (29 Jul 1833 - 27 Jan 1842 Appointed, Archbishop of Camerino)
Giovanni Ferrini, O.F.M. Conv. (27 Jan 1842 - 24 Nov 1846 Resigned)
Felice Cantimorri, O.F.M. Cap. (21 Dec 1846 - 23 Jun 1854 Appointed, Bishop of Parma)
Gaetano Brinciotti (23 Jun 1854 - 16 Nov 1867 Resigned)
Raffaele Corradi, O.C.D. (20 Dec 1867 - 8 Jan 1884 Died)
Ercole Vincento Boffi (24 Mar 1884 - 16 May 1896 Died)
Eutizio Parsi (22 Jun 1896 - 13 Apr 1906 Died)
Rinaldo Camillo Rousset, O.C.D. (6 Dec 1906 - 18 Sep 1909 Appointed, Archbishop of Reggio Calabria)
Giovanni Capitoli (14 Feb 1911 - 23 Aug 1911 Died)
Emilio Poletti (28 Aug 1912 - 17 Dec 1918 Died)
Ludovico Antomelli, O.F.M. (10 Mar 1919 - 24 Mar 1924 Appointed, Bishop of Lodi)
Tranquillo Guarneri (12 Nov 1926 - 21 Jul 1937 Died)
Adelchi Albanesi (13 Dec 1937 - 14 Apr 1942 Appointed, Bishop of Viterbo e Tuscania)
Luigi Rosa (23 Jun 1942 - 3 Oct 1971 Died)
No longer a residential bishopric, Bagnoregio is today listed by the Catholic Church as a titular see.
Since the diocese's nominal restoration is as titular see, it has had the following incumbents, both of the second (archiepiscopal) rank :
Archbishop Mario Rizzi (1991.02.28 – 2012.04.13)
Archbishop Guido Pozzo (2012.11.03 – ...), Secretary of the Pontifical Commission Ecclesia Dei.
