THE EMPIRE BECOMES GREEK.--The two combatants in the fierce struggle which we have been watching, were too much absorbed in their contentions to notice the approach of a storm from the deserts of Arabia,--a storm destined to overwhelm both alike in its destructive course. Within a few years from the date of the Battle of Nineveh, the Saracens entered upon their surprising career of conquest, which in a short time completely changed the face of the entire East, and set the Crescent, the emblem of a new faith, alike above the fire-altars of Persia and the churches of the Empire. Heraclius himself lived to see--so cruel are the vicissitudes of fortune--the very provinces which he had wrested from the hands of the fire-worshippers, in the hands of the more insolent followers of the False Prophet, and the Crescent planted within sight of the walls of Constantinople. The conquests of the Saracens cut off from the empire those provinces that had the smallest Greek element and thus rendered the population subject to the emperor more homogeneous, more thoroughly Greek. The Roman element disappeared, and the court of Constantinople became Greek in tone, spirit, and manners. Hence, instead of longer applying to the empire the designation _Roman_, we shall from this on call it the _Greek_, or Byzantine empire. We shall trace no further as a separate story the fortunes of the Eastern emperors. In the eighth century the so-called Iconoclastic controversy [Footnote: See p. 417.] will draw our attention to them; and then again in the twelfth and thirteenth centuries the Crusades will once more bring their affairs into prominence, and we shall see a line of Latin princes seated for a time (from 1204 to 1261) upon the throne of Constantine. [Footnote: See p. 446.] Finally, in the year 1453, we shall witness the capture of Constantinople by the Turks, [Footnote: See p. 462.] which disaster closes the long and checkered history of the Græco-Roman empire in the East. CHAPTER XXXVI. MOHAMMED AND THE SARACENS. [Illustration: AN ARAB RIDER.] INTRODUCTORY STATEMENT.--The Arabs, or Saracens, who are now about to play their surprising part in history, are, after the Hebrews, the most important people of the Semitic race. Secure in their inaccessible deserts, the Arabs have never as a people bowed their necks to a foreign conqueror, although portions of the Arabian peninsula have been repeatedly subjugated by different races. RELIGIOUS CONDITION OF ARABIA BEFORE MOHAMMED.--Before the reforms of Mohammed, the Arabs were idolaters. Their holy city was Mecca. Here was the ancient and most revered shrine of the Caaba, where was preserved a sacred black stone believed to have been given by an angel to Abraham.