Plato Critias 116

And this island, 116a wherein stood the royal palace, was of five stades in diameter. Now the island and the circles and the bridge, which was a plethrum in breadth, they encompassed round about, on this side and on that, with a wall of stone; and upon the bridges on each side, over against the passages for the sea, they erected towers and gates. And the stone they quarried beneath the central island all round, and from beneath the outer and inner circles, some of it being white, some black 116b and some red; and while quarrying it they constructed two inner docks, hollowed out and roofed over by the native rock. And of the buildings some they framed of one simple color, in others they wove a pattern of many colors by blending the stones for the sake of ornament so as to confer upon the buildings a natural charm. And they covered with brass, as though with plaster, all the circumference of the wall which surrounded the outermost circle; and that of the inner one they coated with tin; and that which encompassed the acropolis itself 116c with orichalcum which sparkled like fire.
  The royal palace within the acropolis was arranged in this manner. In the center there stood a temple sacred to Cleito and Poseidon, which was reserved as holy ground, and encircled with a wall of gold; this being the very spot where at the beginning they had generated and brought to birth the family of the ten royal lines. Thither also they brought year by year from all the ten allotments their seasonable offerings to do sacrifice to each of those princes. 116d And the temple of Poseidon himself was a stade in length, three plethra in breadth, and of a height which appeared symmetrical therewith; and there was something of the barbaric in its appearance. All the exterior of the temple they coated with silver, save only the pinnacles, and these they coated with gold. As to the interior, they made the roof all of ivory in appearance, variegated with gold and silver and orichalcum, and all the rest of the walls and pillars and floors they covered with orichalcum. And they placed therein golden statues, one being that of the God standing on a chariot and driving six 116e winged steeds, his own figure so tall as to touch the ridge of the roof, and round about him a hundred Nereids on dolphins (for that was the number of them as men then believed) ¹ ; and it contained also many other images, the votive offerings of private men. And outside, round about the temple, there stood images in gold of all the princes, both themselves and their wives, as many as were descended from the ten kings, together with many other votive offerings both of the kings and of private persons not only from the State itself but also from all the foreign peoples over whom they ruled.