Following construction work in 1936, the remains of a 2nd century building were discovered on the site, the westernmost part of which had been converted into a mithraeum in the 3rd century. It is located at the back of Palazzo Barberini. The central panel shows the usual tauroctonia, i.e. Mithras killing the bull.
The Barberini Mithraeum is one of the best preserved mithraea in Rome.
