Dioecesis Narniensis, in central Italy, was suppressed in 1907, becoming part of the Diocese of Terni.
Liutprand, King of the Lombards captured the town in 726, but Pope Zacharias persuaded him to restore it to the Duchy of Rome in 742, after which it remained under pontifical rule.
Bishop John (940) was succeeded by his son, who became Pope John XIII; among other bishops were: William, a Franciscan, whom Pope Urban V employed against the Fraticelli (1367); and Raimondo Castelli (1656), founder of the seminary.
From 1198 to 1214, Narni was in rebellion against Pope Innocent III, who temporarily suppressed its episcopal see.
United 12 April 1907 with the Diocese of Terni to form the Diocese of Terni e Narni This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed.