Caracalla (198-217). AR Denarius, Rome mint, 205 AD. Obv. ANTONINVS PIVS AVG. Laureate bust right. Rev. PONTIF TR P VIIII COS II. Mars standing left, leaning on shield and holding spear. RIC IV 83. 3.48 g. 19.5 mm. Lightly toned with warm hues. Slightly porous surface. About EF.