Helena. Mother of Constantine I. Æ Nummus. Constantinople mint, AD 330. FL IVL HELE[NAE] AVG, diademed and draped bust right / PAX PUBLICA, Pax standing left, holding branch and transverse sceptre; CONS[A] in exergue. RIC 35. 1.50g, 14mm. aVF. Nice portrait.
From Evelyn's Coins