The Diocese of Monte Cassino (Latin: Dioecesis Cassinensis) was a Roman Catholic diocese located in Monte Cassino, a rocky hill on the former site of the Roman town of Casinum about southeast of Rome, Italy, to the west of the modern town of Cassino."Diocese of Monte Cassino" Catholic-Hierarchy.org. David M. Cheney. Retrieved August 25, 2016"Territorial Abbacy of Montecassino" GCatholic.org. Gabriel Chow. Retrieved August 25, 2016 It was erected on 2 May 1322 and suppressed in December 1367., p. 169.
Bishops (6 June 1323 – ????), as apostolic administrator Raymond de Gramat (9 April 1326 – 26 July 1340) Guido di San Germano (6 November 1340 – ????) Richer de Miremont (10 October 1341 – 27 February 1343) (14 March 1343 – 13 February 1346), transferred to the diocese of Saint-Pons-de-Thomières Guillaume de Rosières (7 April 1346 – 1353), transferred to the diocese of Tarbes (17 April 1353 – 1355) Angelo Acciaioli (18 March 1355 – 4 October 1357) Angelo della Posta (23 March 1358 – ????) Angelo Orsini (26 August 1362 – December 1367)
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