Your search G. Becatti gave 67 results.
Of the Sacello delle tre Navate (Reg. III, Is. II, 2), which lies near the therms- building of the "Sette Sapienti", it cannot be said with certainty if it was a Mithraeum.
Marble slab with inscription walled in the right handside of the lower part of the cult- niche (H. 0.57 Br. 0.29).