A clear example of this issue.
Obverse: the emperor’s head wearing a laurel wreath, facing right; the legend around the edge reads:
IMP CAES DOMITIAN AVG GERM COS XI;
Reverse: The facade of the gate of the “Ara Salutis Augusti” altar, divided into two sections with doors and four corner posts. The altar was likely built during the reign of Titus; in the S and C fields, the inscription reads “SALVTI AVGVSTI”;
Bronze, diameter 29 mm, weight 11.59 g, axis 6 h.







