Constantine I the Great (AD 307-337). AE3 or BI nummus (19mm, 3.03 gm, 11h).  Cyzicus, 2nd officina, ca. AD 329-330. CONSTANTI-NVS MAX AVG, rosette-diademed, draped and cuirassed bust of Constantine I right, seen from front / PROVIDEN-TIAE AVGG, campgate with seven layers, two turrets, star above, no doors; SMKB below. RIC VII 61.