Constantinus I. (Constantine), Heraclea mint, 317 AD.,
Æ Follis (18-20 mm / 4,44 g),
Obv.: IMP CONSTA - NTINVS AVG , laureate and draped bust of Constantine left, globe and sceptre in left hand; mappa in right hand.
Rev.: PROVIDEN - TIAE AVGG / MHTB , six tiered campgate surmounted by three beacons (no star).
RIC VII 16 (C1) .
This type was initially only issued by Licinius. Constantine added it to the series after Licinius' defeat in their first civil war.
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