CIMRM 1241-1242 - Sol altar with backlight. Bingen, Germany.

From Manfred Clauss, The Roman cult of Mithras, p.125:

Mithras is represented in the typical position on a limestone altar from Bingium in Germania Superior (Bingen) set up in honour of the imperial house to Soli invicto Mitrae (!): the god wears a radiate crown, and a cloak, and is holding a whip (fig. 91; see also pp. 127, 146). The face is now damaged, but the rays of the crown are in fact divided by perforated slits so that they could be illuminated from the rear: there is a hole in the back of ... 91. Bingium/Bingen: perforated altar with the bust of Sol (V 1241). The solar aspect of Mithras is emphasised by the layout of the inscription, with SOLI on the architrave above the relief.

CIMRM entry

1241. Altar in sandstone (H. 0.94 Br. 0.54 D. 0.40). Bingen, Museum, Inv. No. 2464. Behrens in Germania VI, 1922, 82; Lehner in EJ 129, 1924, 86 No. 240; Cagnat in Ann. Ep., 1923, 11 No. 35; Esp. Rec. Ganle VIII, 109 No. 7419; Finke in ERGK XVII, 1927, 75 No. 227; Behrens in Mainzer Zeitschrift XXXII, 1937,43 No. 13 and fig. 27; Behrens, BL, 22 No. 3 and fig. 32. In an almost square niche the dressed bust of Sol with a crown of seven perforated rays. Sol holds a whip; the head is damaged. In the back of the altar is a second niche in order to illuminate the radiate crown of Sol. An inscription: 1242. L.H. 0.025-0.04. In h(onorem) d(omus) d(ivinae) Soli / invicto Mitrae (sic!) / aram Privati Se/cundinus et Ter/tinus et Confinis / ex voto Privati / Tertini v(otum) s(olverunt) l(aeti) l(ibentes) m(erito). The same dedicators are mentioned on an altar with representations of Victoria and Mars (CIL XIII 7505) found near Bingen in 1775.