On the first layer of the left wall there are three lines in the section above door b' on both sides of which are two series of respectively three and two other lines.
During the excavations of the Dolichenum on the Aventine in 1935, two Mithraic monuments have been discovered and besides statues of Sol, Luna, Venus, Silvanus and Hercules.
On the Aventine, between the Eastern side of S. Saba’s and the Via Salvator, there is a Roman building, which probably was used as a Mithraeum in the end of the 4th century.