Hilary of Arles (c. 400–449 CE) was one of the most influential ecclesiastics of the 5th century CE. A scion of an aristocratic family of central Gaul, he entered the monastery of Lérins in his youth. As bishop of Arles, he led a powerful faction of churchmen and secular officials. He placed his supporters into episcopal sees and enforced his authority with church councils (Councils/Synods). Ultimately, Hilary became en…