The Diocese of Gallese (Latin: Dioecesis Gallesina) was a Roman Catholic diocese located in the town of Gallese near the city of Viterbo in the Province of Viterbo. In 1805, it was united with the Diocese of Civita Castellana e Orte to form the Diocese of Civita Castellana, Orte e Gallese. It was restored as a Titular Episcopal See in 1991.
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Roman Catholic Diocese of Gallese Wikipedia(Text) CC BY-SA