Saint Calminius was a 6th or 7th-century monk from Auvergne who transitioned from a military life to religious devotion. He is primarily recognized for establishing three significant French monasteries: Mozac Abbey, Laguenne Abbey, and Monastier-Saint-Chaffre. After studying the Benedictine rule at the Lérins islands, he returned to Auvergne to settle in Mozac. His legacy is closely tied to the religious institutions he founded and the holy relics he sought to bring to his communities, including a portion of the skull of Saint Peter.