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:
Erected: 14th Century
Latin Name: Faliscodunensis o Montis Falisci
Immediately Subject to the Holy See
Name Changed: 5 December 1435
Latin Name: Cornetanus Tarquiniensis et Montisflasconsis
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
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
This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed. (1913). "". Catholic Encyclopedia. New York: Robert Appleton.