Caracalla, AR denarius, Rome. AD 207. 3.38 g. 

ANTONINVS PIVS AVG, laureate head right.
PROVIDENTIA, winged head of Medusa facing. 

RIC 164; RSC 526; Sear 6878.

With permission of Numismatica Ars Classica, Auktion 39, Mai 2007, lot 137.