Diocese immediately subject to the Holy See Viterbo, Italy
Diocese of Viterbo–San Martino al Monte Cimino
Viterbien(sis)
Latin Church
The Diocese of Viterbo is a Latin diocese in Lazio, Italy, immediately subject to the Holy See. Its current ordinary is Bishop Orazio Francesco Piazza, appointed in 2022. The see was consolidated in its present form in 1986 from several historical dioceses.
On the map
Every see on one map: browse the dioceses. Churches with recorded hours: find Mass times.
- Established
- 1192
- Catholics
- 174,400
- Priests
- 112
- Territory
- 2,161 km²
Parishes and churches
101 listed churches in our records. Open a parish for Mass times, confession, directions and sources where recorded.
- San DonatoCivita di Bagnoregio · CathedralView parish
- San GiacomoTuscania · CathedralView parish
- San Lorenzo MartireViterbo · CathedralView parish
- San Martino al Monte CiminoSan Lorenzo Nuovo · CathedralView parish
- San Nicola, San Donato e San BonaventuraBagnoregio · CathedralView parish
- San PietroTuscania · CathedralView parish
- Santa Margherita d’AntiochiaMontefiascone · CathedralView parish
- Santa Maria Assunta e San VivenzioBlera · CathedralView parish
- Santo SepolcroAcquapendente · CathedralMass times recorded
- Sant’ErmeteIschia di Castro · CathedralView parish
- Corpus DominiMontefiasconeMass times recorded
- Cristo ReLa BotteMass times recorded
- Immacolata ConcezioneRoggiView parish
- Natività di Maria SantissimaTrevinanoMass times recorded
- Nostra Signora delle Neve e Sant’Antonio AbateCaninoView parish
- Nostra Signora di LourdesTuscaniaMass times recorded
- Nostra Signora di San GiuseppeViterboView parish
- Sacra CroceOnanoView parish
- Sacra FamigliaViterboMass times recorded
- Sacro CuoreViterboView parish
- Sacro Cuore di GesùTuscaniaView parish
- San Bernardino da SienaPiansanoView parish
- San BonaventuraBagnoregioView parish
- San Clemente IIschia di CastroView parish
- San DonatoCellenoMass times recorded
- San DonatoVetrioloView parish
- San Felice MartireTessennanoView parish
- San FlavianoMontefiasconeMass times recorded
- San FrancescoCaninoMass times recorded
- San FrancescoBagnoregioMass times recorded
This is our recorded coverage, not an official diocesan parish count. Confirm service times with the parish before travelling.
The bishop
- Bishop
- Orazio Francesco Piazza
- Born
- 4 October 1953
- Birthplace
- Solopaca
Explore the ministry of the bishop.
The cathedral
Basilica Cattedrale di San Lorenzo Martire, Viterbo stands in Viterbo, the church that holds the cathedra from which this see takes its name.
Its co-cathedral is Concattedrale di San Nicola, Bagnoregio; Basilica di Santa Maria Maggiore, Tuscania; Basilica del Santo Sepolcro, Acquapendente.
On what a cathedral is, see the cathedral; every see church on earth is gathered at the cathedrals.
History
In central Italy, the Latin Church diocese seated at Viterbo (Latin: Dioecesis Viterbiensis) bore the official name Diocese of Viterbo e Tuscania from the 12th century. A merger of several dioceses in 1986 produced the lengthy title "Diocese of Viterbo, Acquapendente, Bagnoregio, Montefiascone, Tuscania and San Martino al Monte Cimino", which was shortened in 1991 to "Diocese of Viterbo".
This see in the wire
Filed by the see itself
Published on the see's own news feed. A diocese reports on the whole Church, so these are often about somewhere else.
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Bishop Orazio Francesco Piazza to celebrate Eucharist on October 4
Bishop Orazio Francesco Piazza will celebrate Mass for the Giornata pro Episcopo on Sunday, October 4, 2026. The Diocese of Viterbo scheduled the Eucharistic celebration for 18:30 at the Basilica of San Francesco alla Rocca in Viterbo. The event coincides with the Feast of Saint Francis of Assisi, during which the diocese gathers in prayer for its bishop.
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Pope Leo XIV presents Lettera Enciclica on human care in AI age
Pope Leo XIV has issued an encyclical titled Magnifica Humanitas, which addresses the protection of the human person during the age of artificial intelligence. A presentation of the document is scheduled for October 16, 2026, at 18:00 in the Sala Alessandro IV at the Palazzo dei Papi in Viterbo. The event will examine the encyclical within the context of diocesan pastoral work.
- Viterbo renews the Pact of Love
- Bishop Orazio Francesco delivers homily
- Bishop Orazio Francesco Piazza presides pontifical
25 stories in the wire either name this see or come from its own feed. Read the wire.