The southeastern corner of the site is dominated by Darius’ Treasury , one of the earliest structures at Persepolis. Archaeologists have found stone tablets in Elamite and Akkadian detailing the wages of thousands of workers. When Alexander looted the Treasury it’s reported he needed 3000 camels to cart off the contents. The foundations of walls and the bases of 250 columns are all that remain. On the hill above the Treasury are the rock-hewn tombs of Artaxerxes II and Artaxerxes III . It’s worth sitting on the hill for a while to get a feel for the enormous scale of Persepolis.