13.2 Allah is He Who raised the heavens without any pillars that you see, and He is firm in power and He made the sun and the moon subservient (to you); each one pursues its course to an appointed time; He regulates the affair, making clear the signs that you may be certain of meeting …
Mario Collepardi, an Italian Prof. (studied specifically the architecture of the pyramids,) emphasises that the Pharaohs brought the limestone dust available a lot in their area, mixed it with normal soil. Then they added water from the river Nile and lit fire to a temperature up to 900 degrees Celsius. This heat gave the stone …