The First Mound
Every year, after the Nile's waters recede, the first high ground to emerge from the mud is the first to dry and the first to sprout life — and the Egyptians imagined creation as the same scene: from the boundless waters of Nun rose the first "primordial mound" (the benben stone), on which the creator god brought himself into being. The temples of Heliopolis and Memphis each claimed to stand on the exact spot of that mound. The shape of the pyramid, by one account, is that mound of creation turned to stone.