Diodorus of Sicily, with an English translation by C. H. Oldfather. 10 Vols. Cambridge, Mass.: Harvard University Press, 1960. Vol. I (Book I.47), 167-169.
Ten stades from the first tombs . . . stands a monument of the king known as Osymandyas. At its entrance there is a pylon, constructed of variegated stone, two plethra in breadth and forty-five cubits high; passing through this one enters a rectangular peristyle, built of stone, four plethra long on each side; it is supported; in place of pillars; by monolithic figures sixteen cubits high, wrought in the ancient manner as to shape; and the entire ceiling, which is two fathoms wide, consists of a single stone, which is highly decorated with stars on a blue field. Beyond this peristyle there is yet another entrance and pylon, in every respect like the one mentioned before, save that it is more richly wrought with every manner of relief; beside the entrance are three statues, each of a single block of black stone from Syene, of which one, that is seated, is the largest of any in Egypt, the foot measuring over seven cubits, while the other two at the knees of this, the one on the right and the other on the left, daughter and mother, respectively, are smaller than the one first mentioned. And it is not merely for its size that this work merits approbation, but it is also marvellous by reason of its artistic quality and excellent because of the nature of the stone, since in a block of so great a size there is not a single crack or blemish to be seen. The inscription upon it runs: "King of Kings am I, Osymandyas. If anyone would know how great I am and where I lie, let him surpass one of my works." There is also another statue of his mother standing alone, a monolith twenty cubits high, and it has three diadems on its head, signifying that she was both daughter and wife and mother of a king.