CIMRM 10 - Mithraeum. Charax (=Ai-Todor), Crimea
"Aitador" is modern "Ai-Todor" (from a monastery of St. Theodore) in the Crimea. It is situated on the site of the Greek city of Kharaks or Charax, in what was then the Chersonnesos. This held a Roman garrison from the middle of the 1st century A.D. to the middle of the 3rd century A.D.1
IIKA is "Izvesti ja imperatorskoi kommissii archeologiceskoi. See also CR Comm. Arch. Petersbourg", according to Vermaseren, and a low-resolution scan of the relevant issue can be found in DjVu format here: M.I.Rostovtsev, "Sanctuary of Thracian gods and inscriptions of beneficiarii in Ay-Todor (with 8 pls. and 4 figs. in the text)", p.1-42.
A more modern examination of the materials2 presents all the Mithraic monuments found on the north shore of the Black Sea. These consist of bas-reliefs from Olbia and Charax (Ai-Todor), plus terracottas from Paticapaeum (for which see CIMRM 11).3 The fragments from Charax were destroyed during World War II. The presence of Thracians in the Roman garrison in the 3rd century may have encouraged the presence of the cult during the third century.4