Domitian AR Denarius. AD 90-91. 

IMP CAES DOMIT AVG GERM P M TR P X, laureate head right.
IMP XXI COS XV CENS P P P, Minerva standing left, holding spear. 

RIC II 722; BMC 182; RSC 263.

With permission of Numismatica Ars Classica, March 2004.