Ancient Diocese of Tarentaise
The Archdiocese of Tarentaise (Latin: Tarantasiensis) was a Roman Catholic diocese and archdiocese in France, with its see in Moûtiers, in the Tarentaise Valley in Savoie. It was established as a diocese in the 5th century, elevated to archdiocese in 794, and disbanded in 1801.
Source: Wikipedia — Ancient Diocese of Tarentaise (CC BY-SA 4.0)