Illidius was a 4th-century bishop from the Auvergne region of France. Serving the community of Clermont, he played a significant role in establishing the city as a prominent center for religious culture and learning. His historical presence is noted by Gregory of Tours, who recorded his life and deeds. He is remembered for a miraculous healing performed in Trier, where he cured the daughter of the emperor Magnus Maximus, an event that occurred during his travels.
Life and miracles

During his travels, Illidius visited Trier and performed a miracle by healing the daughter of Magnus Maximus. While traveling back toward his home, he passed away in 385. His influence helped transform Clermont-Ferrand into a vital location for spiritual instruction and cultural development within the early church.
Veneration and legacy

Following his death, his tomb became a site that attracted numerous pilgrims. In Clermont, a local fountain containing minerals is associated with him. He is commemorated as a saint in the Catholic tradition, with his feast day observed annually on June 5.
