The Diocese of Bagnoregio is a former Catholic territory, located in the modern Province of Viterbo in the Italian region of Lazio, located about 90 kilometres (56 mi) northwest of Rome.[1][2] Prior to the creation of the Kingdom of Italy, it belonged to the Papal States, and was located in the region of Umbria. It had been given to the Papal States by the Emperor Louis I in 822.[3] In terms of religious administration, it was directly dependent upon the Holy See (Papacy). The pope appointed an Apostolic Administrator for the diocese of Bagnoregio on 8 June 1970, and the bishop was not replaced when he died in 1971. The diocese was suppressed on 30 September 1986 by Pope John Paul II.