Your selection in monuments gave 5 results.
The Tauroctony from Landenburg, Germany, shows a naked Mithras only accompanied by his fellow Cautes.
"The remaining figure on this monument, Herakles, was previously misidentified as Apollo on this remarkable black basalt tablet from Samsat, known in Roman times as Samosata.
Franz Cumont considers the bas relief of Osterburken ’the most remarkable of all the monuments of the cult of Mithras found up to now’.
This marble relief was found in a Mithraeum in Ptuj.
The St Albans mithraic vase depicts fragments of three figures identified by Vermaseren as Hercules, Mercury and Mithras as an archer.