Diocese of Ferento
Ferento is a former city (state) and bishopric (now titular see) near Viterbo (in Lazio, Central Italy), which absorbed it.
Ferento started as an Ancient city, Ferentium, which was important enough to become a bishopric around 400 AD.
In 700 AD, its diocese was suppressed and its territory annexed to the Diocese of Bomarzo.
In 1172, the neighbouring city state Viterbo started its expansion, destroying the old city of Ferento.
In 1970, the old diocese was nominally restored as a Latin titular see.
It has had the following incumbents, of both the lowest (episcopal) and intermediate (archiepiscopal) ranks:
Coordinates: 42°29′19″N 12°07′57″E / 42.4886°N 12.1325°E
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