the Arabs, rises to a height of 153 feet above the plain from a base covering a square of 400 feet, or almost four acres. It was constructed of kiln-dried bricks in seven stages to correspond with the planets to which they were dedicated: the lowermost black, the colour of Saturn; the next orange, for Jupiter; the third red, for Mars; and so on.14 These stages were surmounted by a lofty tower, on the summit of which, we are told, were the signs of the Zodiac and other astronomical figures; thus having