Tags: Clerical Administrative Region, Diocese.
The Roman Catholic Diocese of Viterbo (Latin: Dioecesis Viterbiensis) is a Catholic ecclesiastical territory in central Italy. It was called historically (from the 12th century) the Diocese of Viterbo e Tuscania. Its name was changed to Diocese of Viterbo Acquapendente Bagnoregio Montefiascone Tuscania e San Martino al Monte Cimino in 1986 and shortened in 1991. The diocese is immediately subject to the Holy See.
