If then we resign the notion of this remarkable building having been a walled structure, we must suppose that it was a summer throne-room, open to all the winds of heaven, except so far as it was protected by curtains. For the use of these by the Persians in pillared edifices, we have important historical authority in the statement already quoted from the Book of Esther. The Persian palace, to which that passage directly refers, contained a structure almost the exact counterpart of this at Persepolis; and it is probable that at both places the interstices between the outer pillars of, at any rate, the great central colonnade, were filled with “hangings of white and green and blue, fastened with cords of white and purple to silver rings,” which were attached to the “pillars of marble;” and that by these means an undue supply of light and air, as well as an unseemly publicity, were prevented. A traveller in the country well observes, in allusion to this passage from Esther: Nothing could be more appropriate than this method at Susa and Persepolis, the spring residences of the Persian monarchs. It must be considered that these columnar halls were the equivalents of the modern throne-rooms, that here all public business was dispatched, and that here the king might sit and enjoy the beauties of the landscape. With the rich plains of Susa and Persepolis before him, he could well, after his winter’s residence at Babylon, dispense with massive walls, which would only check the warm fragrant breeze from those verdant prairies adorned with the choicest flowers. A massive roof, covering the whole expanse of columns, would be too cold and dismal, whereas curtains around the central group would serve to admit both light and warmth. Nothing can be conceived better adapted to the climate or the season. If the central cluster of pillars was thus adapted to the purposes of a throne-room, equally well may the isolated colonnades have served as ante-chambers or posts for guards. Protected, perhaps, with curtains or awnings of their own, of a coarser material than those of the main chamber, or at any rate casting, when the sun was high, a broad and deep shadow, they would give a welcome shelter to those who had to watch over the safety of the monarch, or who were expecting but had not yet received their summons to the royal presence. Except in the very hottest weather, the Oriental does not love to pass his day within doors. Seated on the pavement in groups, under the deep shadows of these colonnades, which commanded a glorious view of the vast fertile plain of the Bendamir, of the undulating mountain-tract beyond, and of the picturesque hills known now as Koh-Istakhr, or Koh-Rhamgherd, the subjects of the Great King, who had business at Court, would wait, agreeably enough, till their turn came to approach the throne.