Coin of Septimius Severus and god on horseback

A god on horseback on coins from Istros or Histria, in Moesia Inferior, modern Istria, Romania. On the obverse is Septimius Severus, on the reverse a god. The god wears a polos (a crown worn by gods and goddesses in the ancient Orient) and is dressed like an Eastern god. The bird (raven) and torch on the left indicate that it is maybe Mithras.

He also has a beard, although Mithras is traditionally depicted as a beardless young man. These attributes could again be attributed to Persian influences. This type of coin seems to have been struck only during the reigns of Septimius Severus and Gordian III.