Constantine I, 307 - 337 AD
AE Follis, Cyzicus Mint, 19mm, 2.46 grams
Obverse: CONSTANTINVS MAX AVG, Pearl diademed, draped and cuirassed bust of Constantine right.
Reverse: PROVIDENTIAE AVGG, Campgate with two turrets and no doors, SMKE in exergue.
RIC61
Lovely green patina.