Saint Domnin was a 4th-century bishop originally from North Africa. Following a council in Rome in 313, he traveled with other North African bishops to evangelize various regions. He served as the first Bishop of Digne from 364 until his death in 379, and he also held the position of archbishop in Vienne. During his missionary work, he was known for preaching the gospel throughout the Italian side of the Alps and the Ubaye valley.