It is believed Giza complexs has been build as a tomb for pharaoh Khufu and constructed over 20 year period of time. People had been seeking answer to purpose of Great pyramid for more than 4000 years. So many alternative theories had been discuted: astronomical observatory, a place for religious rituals, sundeal, grtain storage facility, a water irrigation system, and list goes on.

The word pyramid derives from the Greek words pyramis and pyramidos, the meaning of the word pyramis in not known, but pyramidos in greek means "Fire in the Middle".

The temperature inside The Great Pyramid is at a constant 68 degrees Fahrenheit, which is exactly the same at the earths internal temperature.