He immigrated to Gaul and retired to a dilapidated tower, situated on the peninsula of Cap Ferrat, a few miles east of Nice.
The people of the environs frequently consulted him; he forewarned them on one occasion, about the year 575, of an impending incursion of the Lombards.
He worked a miracle in favor of one of the warriors, who became converted, embraced the religious life, and was known personally to Gregory of Tours.
It was from him that Gregory, to whom we are indebted for the meagre details of the saint's life, learned of the austerities and numerous miracles of the recluse.
Hospitius foretold his death and was buried by his friend, Austadius, Bishop of Cimiez.