Vigilantius (vĭjˌĭlănˈshəs) [key], fl. 400, Christian priest of Gaul who was violently opposed by St. Jerome. Jerome's letters and a tract, Liber contra Vigilantium, declare that Vigilantius denied the efficacy of relics, prayers to the saints, almsgiving, celibacy of the clergy, and monasticism. His works are not extant.
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