Helena, mother of Constantine I. AE 14 mm, 337-340 AD. Treveri mint. Obv. FL IVL HELENAE AVG. Diademed and draped bust right. Rev. PAX PVBLICA. Pax standing facing, head left, holding branch and sceptre; in exergue, TRP. RIC 55. AE. g. 1.51 mm. 14.00 R. VF.