A new interpretaion
AR Denarius (17mm, 2.73g, 6h). Rome mint, struck Sept 18 - Dec 31, 81 (Commemorative Issue, RIC's "Group 1"), aggpa.
IMP CAESAR DOMITIANVS AVG, head laureate right; TR P COS VII, draped table, over which crossed thatched roof, the Circus Parade float representing the rude spelt-covered cottage of Romulus, Rome's founder.
RIC 3 (R), BMC 2, RSC 554a.