The relief of Mithras slaying the bull from the Mithraeum of the Seven Spheres was discovered in 1802 by Petirini by order of Pope Pius VII.
TNMM144 – CIMRM 245, 246
A. Decimius A(uli) f(ilius) Pal(atina) Decimianus s(ua) p(ecunia) restituit. //
A. Decimius A(uli) f(ilius) Pal(atina) Decimianus aedem / cum suo pronao ipsumque deum solem Mithra / et marmoribus e…
The Mithraeum of Osterburken could not be excavated bodily owing to the water of a well in the immediate neighbourhood. The monument had been covered carefully with sand.