Coin depicted roughly twice actual size*

AE3 of Constantine I

Bronze AE3, 19mm, 2.61gm, issued AD 326-328 Thessalonica mint.

Obv: CONSTANTINVS AVG or CONSTANTINVS AVG, Diademed, draped, cuirassed bust right.

Rev: PROVIDENTIAE AVGG (SMTSΓ in ex.), Camp gate with two turrets, without doors, with varying number of stone layers; star above.

References: Sear 16254, RIC 154.