The diocese of Montefiascone was a Catholic ecclesiastical territory in Italy. It was created from the diocese of Bagnorea in 1396, and in 1986 was united into the diocese of Viterbo, Acquapendente, Bagnoregio, Montefiascone, Tuscania e San Martino al Monte Cimino.
Its first bishop was the French Augustinian Pierre d'Anguiscen (1376), a partisan of the antipope Clement VII. In 1435 the see was united with the diocese of Corneto, and so remained until, in 1854, Corneto became a part of the diocese of Civitavecchia.
Among its bishops were:
Bartolomeo Vitelleschi (1442)
Domenico Delle Rovere (1478)
Alessandro Farnese (1501), later Pope Paul III;
Guido Ascanio Sforza di Santa Fiora (1528-1548);
Carlo Grassi (1555);
the two brothers and cardinals Paolo Emilio Zacchia (1601) and Laudivio Zacchia (1605), both of whom did much for the building of the cathedral;
Gasparo Cecchinelli;
Cardinal Paluzzo Paluzzi Altieri degli Albertoni (1666), founder of the seminary and restorer of the cathedral, which was damaged by a fire in 1670;
the scholar Cardinal Marcantonio Barbarigo (1687), who came from the diocese of Padua, and who gave great assistance after the earthquake of 1695;and founded the Maestre Pie Filippini
Cardinal Pompeo Aldrovandi (1734);
Francesco Maria Banditi (1772);
the scholar Giuseppe Garampi (1776), who gave its library to the seminary;
Cardinal Giovanni Sifredo Maury (1794);
Cardinal Bonaventura Gazzola (1820)
Cardinal Giuseppe Maria Velzi (1832)
Gabriele Ferretti (1837);
Filippo de Angelis (1838);
Nicola Mattei Baldini
Niccola Clarelli Parracciani (1844);
Conceto Focacetti
Giovanni Rosi
Domenico Rinaldini
Erected: 14th Century
Latin Name: Faliscodunensis o Montis Falisci
Immediately Subject to the Holy See
Nicola Scarinci (1379 - 1398 Died)
Name Changed: 5 December 1435
Latin Name: Cornetanus Tarquiniensis et Montisflasconsis
Pietro Dell'Orto (12 Dec 1435 - 6 Mar 1439 Appointed, Bishop of Massa Marittima)
...
Gisberto Tolomei (1467 - 1478 Died)
Domenico della Rovere (24 Aug 1478 - 22 Apr 1501 Died)
Alessandro Farnese (1499 - 28 Mar 1509 Appointed, Bishop of Parma)
Lorenzo Pucci (23 Mar 1519 - 13 Apr 1519 Resigned)
Guido Ascanio Sforza di Santa Fiora (12 Nov 1528 - 4 Jun 1548 Resigned)
Ubaldinus Bandinelli (4 Jun 1548 - Mar 1551 Died)
Achille Grassi (21 Aug 1551 - 1555 Died)
Carlo Grassi (20 Dec 1555 - 25 Mar 1571 Died)
Ferdinando Farnese (27 Aug 1572 - 30 Mar 1573 Appointed, Bishop of Parma)
Francesco Guinigi (8 Apr 1573 - Jan 1578 Died)
Vincenzo Fucheri (29 Jan 1578 - 1580 Died)
Girolamo Bentivoglio (7 Oct 1580 - 12 Apr 1601 Died)
Paolo Emilio Zacchia (14 May 1601 - 31 May 1605 Died)
Laudivio Zacchia (17 Aug 1605 - 13 May 1630 Resigned)
Gasparo Cecchinelli (13 May 1630 - 1666 Died)
Paluzzo Paluzzi Altieri Degli Albertoni (29 Mar 1666 - 19 May 1670 Appointed, Archbishop of Ravenna)
Domenico Massimo (18 Mar 1671 - Sep 1685 Died)
Marcantonio Barbarigo (7 Jul 1687 - 26 May 1706 Died)
Sebastiano Pompilio Bonaventura (15 Nov 1706 - May 1734 Died)
Pompeio Aldrovandi (9 Jul 1734 - 6 Jan 1752 Died)
Mario Antonio Maffei (12 Apr 1752 - 1754 Resigned)
Xaverius Giustiniani (14 Jan 1754 - 13 Jan 1771 Died)
Francesco Maria Banditi, C.R. (30 Mar 1772 - 26 May 1775 Resigned)
Giuseppe Garampi (20 May 1776 - 4 May 1792 Died)
Jean-Siffrein Maury (21 Feb 1794 - 24 Mar 1816 Resigned)
Bonaventura (Domenico Giuseppe) Gazzola, O.F.M. Ref. (21 Feb 1820 - 29 Jan 1832 Died)
Giuseppe Maria Velzi, O.P. (2 Jul 1832 - 23 Nov 1836 Died)
Gabriele Ferretti (19 May 1837 - 2 Oct 1837 Appointed, Archbishop of Fermo)
Filippo de Angelis (15 Feb 1838 Succeeded - 27 Jan 1842 Appointed, Archbishop of Fermo)
Nicola Mattei Baldini (27 Jan 1842 - 23 Oct 1843 Died)
Niccola Clarelli Parracciani (22 Jan 1844 - Jun 1854 Resigned)
14 June 1854: United with the Diocese of Civitavecchia and then split into the Diocese of Montefiascone and the Diocese of Tarquinia e Civitavecchia
Immediately Subject to the Holy See
Luigi Jona (23 Jun 1854 - 30 Nov 1863 Died)
Giuseppe Maria Bovieri (22 Feb 1867 - 22 Apr 1873 Died)
Concetto Focaccetti (25 Jul 1873 - 15 Jul 1878 Appointed, Bishop of Acquapendente)
Luigi Rotelli (15 Jul 1878 - 22 Dec 1882 Resigned)
Luciano Gentilucci (15 Mar 1883 - 29 Nov 1895 Appointed, Bishop of Fabriano e Matelica)
Domenico Rinaldi (29 Nov 1895 - 21 Apr 1907 Died)
Domenico Mannaioli (16 Aug 1907 - 6 Aug 1910 Resigned)
Giovanni Rosi (19 Dec 1910 - 5 Apr 1951 Died)
Luigi Boccadoro (14 Jun 1951 - 27 Mar 1986 Appointed, Bishop of Viterbo, Acquapendente, Bagnoregio, Montefiascone, Tuscania e San Martino al Monte Cimino)
27 March 1986: United with the Diocese of Acquapendente, the Diocese of Bagnoregio, and the Diocese of Viterbo e Tuscania to form the Diocese of Viterbo, Acquapendente, Bagnoregio, Montefiascone, Tuscania e San Martino al Monte Cimino
