Moreover the question is what the symbol of Constantinople was at the time it was captured by the Turks. And an inspection of the coins issued by the Christian rulers of that city during the thousand years and more it was in their hands, will reveal to the enquirer that though the crescent with a _cross_ within its horns appears occasionally upon the coins of the Emperors of the East, and in one or two instances we see a cross of four equal arms with each extremity piercing a crescent, it is doubtful if a single example of the so-called "_star_ and crescent" symbol can be found upon them. We learn from other sources also that the symbol of the imperial Christian Metropolis captured by the Turks nearly five hundred years ago and ever since retained by them, was a simple crescent. And there is no doubt whatever that the dual symbol of the Moslems was adopted by them, not when they brought about the downfall of Constantinople as a Christian city, but centuries before, as a result of the conquest of Persia. It was in the year A.C. 641 that the battle of Nehavend, ever after called by the Moslems the _Victory of Victories_, laid at the feet of the followers of the Prophet the kingdom of Iran or Persia, and brought to an end the Sassanian Monarchy. Now the coins of the Sassanian kings then and for the previous two centuries bore upon them, with scarcely an exception, the so-called "_star_ and crescent"; and it was as the symbol of this Zoroastrian dynasty and of the fair land of Iran, that the Moslems adopted it as their own. What the star-like object (star-like, that is, in _our_ opinion) represented upon the coins of Iran or Persia when placed within the horns of a crescent, was, of course, the Sun. The supposition of certain writers that the dual symbol represented the two crescent-presenting orbs, Venus and the Moon, is entirely mistaken. For though the conjunction of the two crescent-shaped and feminine lights of heaven, was of old, like the combination of the symbol of the Sun--as representing the Male Principle--with that ever feminine symbol the Crescent, held to signify Increase and Life, we are dealing with what was admittedly a Mithraic symbol. And not only was the star-like object in question the symbol of the Sun-God Mithras, but it was, as any student of the coins of the Sassanian dynasty can see, substituted for the disc. Upon the Sassanian coins the so-called star, in reality a representation neither of a star nor of a planet but of the radiate Sun, seems to have been first substituted for the round disc as a representation of the Sun, by Perozes, about A.C. 457; the disc in the horns of a crescent being the symbol on the coins of his father Isdigerd II. and other predecessors. But the dual symbol miscalled the "star and crescent" was one even then of great antiquity, as will be shown in a later chapter dealing with Phoenician relics discovered in Cyprus and elsewhere.