This Constantinopolis commemorative has a cross-like design resembling an equilateral or Greek cross engraved on the shield. Whether or not this was meant as Christian symbolism or was just a design the engraver liked is debatable; but it is still an extraordinary example.
It seems appropriate to include the quote from Palladas, a fourth-century pagan poet, who wrote mockingly about the city of Constantinople and coins with Victories on the prow --
"Here we are, the Victories, the laughing maidens, bearing victories to the Christ-loving city. Those who loved the city fashioned us, stamping figures appropriate to the victories." (Anth. Plan. 282)
Constantinopolis Commemorative
A.D. 330-3
17mm 2.4gm
Obv. CONSTAN-TINOPOLIS laureate, helmeted, wearing imperial mantle, holding reversed spear/scepter.
Rev. Victory stg. on prow, holding long scepter in r. hand, and resting l. hand on shield engraved with equilateral cross.
in ex. BSIS
RIC VII Siscia 224