Look at the central window! Naturally, there sits the Virgin, with her genealogical tree on her left, and her Son's testimony on her right to prove her double divinity. She is seated in the long halo; as, on the western portal, directly beneath her, her Son is represented in stone, Her crown and head, as well as that of the Child, are fourteenth-century restorations more or less like the original; but her cushioned throne and her robes of imperial state, as well as the flowered sceptre in either hand, are as old as the sculpture of the portal, and redolent of the first crusade. On either side of her, the Sun and the Moon offer praise; her two Archangels, Michael and Gabriel, with resplendent wings, offer not incense as in later times, but the two sceptres of spiritual and temporal power; while the Child in her lap repeats His Mother's action and even her features and expression. At first sight, one would take for granted that all this was pure Byzantium, and perhaps it is; but it has rather the look of Byzantium gallicized, and carried up to a poetic French ideal. At Saint-Denis the little figure of the Abbe Suger at the feet of the Virgin has a very Oriental look, and in the twin medallion the Virgin resembles greatly the Virgin of Chartres, yet, for us, until some specialist shows us the Byzantine original, the work is as thoroughly French as the fleches of the churches. Byzantine art is altogether another chapter, and, if we could but take a season to study it in Byzantium, we might get great amusement; but the art of Chartres, even in 1100, was French and perfectly French, as the architecture shows, and the glass is even more French than the architecture, as you can detect in many other ways. Perhaps the surest evidence is the glass itself. The men who made it were not professionals but amateurs, who may have had some knowledge of enamelling, but who worked like jewellers, unused to glass, and with the refinement that a reliquary or a crozier required. The cost of these windows must have been extravagant; one is almost surprised that they are not set in gold rather than in lead. The Abbe Suger shirked neither trouble nor expense, and the only serious piece of evidence that this artist was a Greek is given by his biographer who unconsciously shows that the artist cheated him: "He sought carefully for makers of windows and workmen in glass of exquisite quality, especially in that made of sapphires in great abundance that were pulverized and melted up in the glass to give it the blue colour which he delighted to admire." The "materia saphirorum" was evidently something precious,--as precious as crude sapphires would have been,--and the words imply beyond question that the artist asked for sapphires and that Suger paid for them; yet all specialists agree that the stone known as sapphire, if ground, could not produce translucent colour at all. The blue which Suger loved, and which is probably the same as that of these Chartres windows,