Probable Mithraeum on the Aventine between S. Saba and Via Salvator, Rome

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.Gatti in NSc 1925, 382ff and fig. (cf. AA 1927, 108). See fig. 128.The building lies East-West and consists of a long corridor (L. 20.00 Br. 2.95) with three semicircular niches in the Northern wall. The mosaic floor has been preserved in niche 1 (Br. 3.19 D. 2.47) and niche 3 (Br. 3.45 D. 2.60) and in room 4, but not in the smaller niche 2 (Br. 2.87 D. 2.12).Outside the corridor-wall, there was a large basin (L. 6.40 Br. 4.85 D. 1…