Khufu’s Pyramid is built entirely of limestone, and is considered an architectural masterpiece. It contains around 1,300,000 blocks ranging in weight from 2.5 tons to 15 tons and is built on a square base with sides measuring about 230m (755ft), covering 13 acres.(Kowloon Walled city plot measuring about 210 by 120 m) Its four sides face the four cardinal points precisely and it has an angle of 52 degrees.

The shape of Egyptian pyramids is thought to represent the primordial mound from which the Egyptians believed the earth was created. The shape of a pyramids is thought to be representative of the descending rays of the sun, and most pyramids were faced with polished, highly reflective white limestone, in order to give them a brilliant appearance when viewed from a distance.

How curious that Egyptian chose stacked blocks of limestone as representation of ephemeral light.