Christus Triumphans--Another entry on early Christian art
From the Oxford Dictionary of Christian Art:
An ". . .important point about the two early representations (of the crucifixion) is that the figure of Christ is standing against, rather than hanging from, the cross. He wears only a loin-cloth and is fastened by four nails, but is triumphing over death rather than dying. This emphasis on victory, not on agonizing death, is characteristic of all the earliest representations, as Christus Triumphans."