During a trip with his father to Amiens, France to ransom or rescue an imprisoned relative during the persecutions of Diocletian, the nine-year-old Justus was denounced to pagan authorities as a Christian magician. Questioned about his faith at Beauvais, France, the boy confessed that he was a Christian; he was immediately executed. Legend says that the body then picked up the severed head and stood upright before the terrified soldiers; later retellings depict the headless boy preaching and converting the pagans.
- beheaded in 285 at Beauvais, France
- majority of relics in the cathedral in Paris, but others in Zutphen, Netherlands and smaller locations in France, Belgium and England