Rare follis minted by Constantine I the Great.
Rarity in Roman Imperial Coinage is R3.
Roman Imperial
Constantine I the Great (307–337), Follis 327-328, Antioch mint
Obverse: rosette-diademed head right
CONSTANTINVS AVG
Reverse: Camp gate with two turrets, without doors, star above, SMANTZ in exergue
PROVIDENTIAE AVGG
Diameter 19 mm, weight 3.27 g