The iconography of this relief is unusual in that Mithras is depicted neither with his characteristic Phrygian cap, nor in his traditional tauroctonus pose. However, the identification of the main figure as Mithras can be supported by the inclusion of Sol on his quadriga, the downturned torch, and the hound. The Mysteries of Mithras held their god as the victor of a dualistic world, with light and good conquering darkness and evil. This relief may represent Mithras in his role as judge and arbiter of heaven, ruling over the fate of the three souls represented in the lower left corner. Mythraic religion and iconography was fully treated by Cumont in his 1903 work, The Mysteries of Mithra, a work which is still the centerpiece of modern Mithraic studies. In the chapter, "Doctrine of the Mythraic Mysteries," he introduces much of the more elusive iconography and the relation to the god's mythology and function.