Domitian (81-96) AR Denarius (Silver, 3.24g, 20mm) Rome.
Obv: IMP CAES DOMIT AVG GERM P M TR P VIIII, Laureate head right.
Rev: IMP XXI COS XV CENS P P P, Minerva standing left, holding thunderbolt and spear; shield at feet to right.
Ref: RIC² 691.