Caracalla AE sestertius, AD 198-217. Rome, struck AD 213. 27.45 g. 

M AVREL ANTONINVS AVG GERM, laureate, draped and cuirassed bust right.
P M TR P XVI IMP II around, COS IIII P P / S S below, view of the Circus Maximus seen from the Forum Boarium: arcade of fourteen arches with a large triumphal arch at each end with shrines at the sides; spina with central obelisk on the left, with a fountain and an srchway surmounted by a racing biga to left, a trophy, a fountain and equestrian statue of Trajan to right.

RIC 500a var (..AVG BRIT); BMC 251 var. (ditto); Cohen 236 var (ditto).

Ex Triton II auction, lot 958 Dec. 
With permission of Numismatica Ars Classica auction 59, 1053, April 2011.