Hilary of Arles was a 5th-century bishop and writer who served the church in Southern France. Born around 401, he joined the abbey of Lérins in the 420s before succeeding his relative, Honoratus, as the bishop of Arles in 429. During his tenure, he sought to establish primacy over the churches in south Gaul, a goal that led to significant jurisdictional conflicts with the papacy. He was recognized for his intellect and his efforts to organize the cathedral clergy into an ascetic congregation.