 The model of the magician in Christian thought was provided by Simon Magus, or "Simon the Magician", a figure who opposed Saint Peter in both the Acts of the Apostles and the apocryphal yet influential Acts of Peter.The historian Michael D. Bailey stated that in medieval Europe, "magic" was a "relatively broad and encompassing category".Christian theologians believed that there were multiple different forms of magic, the majority of which were types of divination, for instance, Isidore of Seville produced a catalogue of things he regarded as magic in which he listed divination by the four elements i.e.