The niche contained a stucco high-relief tauroctony, as is proven by the presence, on the white plaster in the niche, guide-marks for fixing it in, and there are the remains of great iron nails (pl. XVIII, 2) in the niche, nails which are also embedded in the remains of the relief. Many fragments were found of the group; red from the coat of Mithras, brown from the bull, but not enough to reassemble it. The relief was 1.2m wide, filling the whole niche.
But from this relief the head of Mithras (inv. n. 205826) has survived (pl. I). It is 26cm high, and gilded.