Helena, Augusta, AD 324-328/30. Bronze Follis 16 mm,
Constantinopolis mint, struck 330 AD.

FL IVL HELENAE AVG, diademed and draped bust of Helena to right,
wearing necklace.  Rev:  PAX PVBLICA  CONSЄ, Pax standing front,
head to left, holding branch in her right hand and scepter in her left.

RIC 33.

Helena was the mother of Constantine I