Theudère du Dauphiné was a 6th-century Christian monk, abbot, and hermit from the Dauphiné region of France. Born into a noble family near modern-day Saint-Chef, he originally sought to join the Lérins Abbey. Instead, he was ordained by Saint Caesarius of Arles. After honing his monastic discipline, he returned to Vienne to establish several monasteries for his growing number of disciples. He is remembered for his ascetic life, having spent his final twelve years living as a recluse in a walled cell within the Church of Saint Lawrence.