But did the so-called Monogram of Christ first come into being as a combination of two letters; Greek, Roman, or otherwise? Even this is not certain, for this pre-Christian symbol may originally have been a cross, as a symbol of Life and of the Sun-God, _plus_ the Greek letter P as the initial character of the word "Rome" in what may be called the court language of the time. Such an explanation would more or less account for the variations {image "monogram3.gif"} and {image "monogram4.gif"}; these being obviously the natural ways of adding the letter P, signifying Rome, to the crosses {image "x.gif"} and {image "plus.gif"} respectively. All the foregoing references to the origin of the so-called monogram as a Pagan symbol of pre-Christian date, are but speculations however. Its origin cannot be ascertained for certain. The revival of this pre-Christian symbol, and the prominence given to it upon the coins of the Roman Empire, _are_, however, traceable. And, as has been shown, they are traceable to Constantine; who induced the Christians to accept as the Monogram of the Christ, and therefore as a Christian as well as a Gaulish symbol of victory, the Solar Wheel venerated by the Gaulish conquerors of Rome. Nowadays the so-called Monogram of Christ is almost always reproduced for us as {image "monogram3.gif"} or {image "monogram4.gif"}; but the fact that Constantine sometimes so used it should not blind us to the facts that it was at first usually the centre of a circle, like the spokes of a wheel; and that the undisguised solar wheel {image "solarwheel1.gif"} appears upon not a few of the coins issued by the Christian successors of Constantine, while since his reign the solar wheel {image "solarwheel2.gif"} and many an artistic variation of the same have been Christian symbols, and when in our ornamentation of ecclesiastical properties we omit the circle we as often as not make the cross itself wheel-like by rounding the extremities and widening them till they nearly meet.