| Name | Location | Status | Key Finds | CIMRM/Other Ref | Latitude | Longitude | Date Discovered | Notes |
|---|---|---|---|---|---|---|---|---|
| Mithraeum of Emona | Ljubljana, Slovenia | Confirmed | Tauroctony altar | CIMRM 1472-1475 | 46.05 | 14.5 | 1906 | Roman colony site. |
| Mithraeum of Poetovio | Ptuj, Slovenia | Confirmed | Three tauroctony reliefs | CIMRM 1438-1443 | 46.42 | 15.87 | 1898 | Largest in Slovenia. |
| Mithraeum of Ptuj (Poetovio III) | Ptuj, Slovenia | Confirmed | Fresco fragments | CIMRM 1444-1446 | 46.42 | 15.87 | 1899 | Third Mithraeum at site. |