Look at the similarity in iconography between this provincial from Philippopolis (Septimius Severus) and this imperial issue of Probus. Both have a bucranion (ox head) and a lion. Is there some significance to this?
Possibly related to the Mithraic mysteries- Lion and Bull/Ox are fixed signs- fire and Earth, of the zodiac and have prominence in the cult of Mithras.
Here is a really good link/article on the cult of Mithras. The lion is the fourth of seven levels of initiation in the cult that regards the slaying of the bull as preeminent- representing the one who moves the Earth and the skies- precesession of the equinoxes(from Taurus to Aries etc,,,,). http://www.cais-soas.com/CAIS/Religions/iranian/Mithraism/m_m/pt8.htm
Intriguing... There´s a very rare Ambiani celtic coin with obv. lion, rev. horse & obv./rev. bucranions: La Tour 8498
Bulls (or bull men) and lions have been paired together for tens of thousands of years. The earliest recorded is at Chauvet (a bull man with lion above). The theme is popular in early Greek coinage, especially at Lydia and other Anatolian mints.
Wonder how many other little small details in ancient coin designs have backstories that are lost to us - or, at times, overlooked by us. Guess there's no way to know (obviously), but I think it's really neat when some of the stories (or at least hints of them) come to light.
Christianity adopted elements of many of the mystery traditions we see expressed on the ancient coins. Have a great Holy week for those who celebrate and a joyous Passover if you celebrate that one. Oh yeah- and if you still celebrate any of the European or aboriginal Earth based religious traditions for springtime such as those of the Greco-Roman pagan world may you help bring Peace, happiness, health and abundance to the Earth
Um, is it just me, or does St. Matthaeus look rather *ahem* ... busty in that rendering? No? Just me, then? OK. I'll go wash my mind out with soap now.