Justus of Beauvais was a Gallo-Roman saint who lived during the late third century. Born in Auxerre, he is traditionally identified as a martyr who died in Amiens. According to legend, he was executed during the persecutions under Diocletian, where he was beheaded for his Christian faith. Some traditions suggest he was a cephalophore, a type of martyr who miraculously spoke after losing his head. His historical identity is sometimes difficult to distinguish from other saints due to the overlapping nature of his legends.