We learned about the life of San Lussorio through the three versions of the Passio (the report of the trial suffered by the martyr), which is based on a primitive script dating back to VIII –X century.
They say that Lussorio, a young man from Cagliari who lived in the III century, became the apparitor (body guard) of the judge Delasio during the Diocletian Empire. He had distinguished himself for his ferocity in pursuing Christians. Following the reading of the psalms, however, he converted to the Christian faith. Despite Dante’s attempts to convert him back to paganism, he remained firm in his decision. He was then sentenced to scourging and then beheaded together with Ceselle and Camerino (two children who also both converted to the Christian faith) in extra civitatem calaritanum or prope Calarim, that is outside (extra) but still near (prope) to Cagliari city.
According to another legend, the apparitor Lussorio would have been scourged at Fordongianus (the Foritraianensis, Foro Traiani or Frontoiani cited in other versions of the Passio) headquarters of the military chiefs. Considered dead and abandoned on the ground by his executioners, he was miraculously healed by Jesus, and continued to preach until he was arrested again and finally beheaded. This thesis would be confirmed by a marble slab found in the church of Saint Lussorio at Fordongianus. It says the blood of the saint was scattered, but there is no reference to the tomb. Although, all scholars are certain in affirming about his martyrdom, they do not however agree on indicating the exact location on which it took place.