Very rare Trebonianus antoninianus with a temple on the reverse. This type was borrowed from the coin of Philip I, which was minted on the occasion of the Roman millennium.
Roman Imperial
Trebonianus Gallus (251-253), Antoninianus 251-252, Antioch mint
Obverse: radiate, draped and cuirassed bust right
IMP C C VIB TREB GALLVS P F AVG
Reverse: hexastyle temple with figure of Roma in centre, V in exergue
SAECVLLVM NOVVM
Weight 4.5 g