In The Cult of Mithras in Late Antiquity David Walsh explores how the cult of Mithras developed across the 3rd and 4th centuries A.D. and why by the early 5th century the cult had completely disappeared.
What fascinates me is the bull's mouth next to the flame of Cautes. Many bulls with their heads raised are in front of Cautès, just with the flame in front of their mouth. It is the soul that comes out and goes up to heaven with Cautès.