Why wonder why the Great Pyramid was built? Because it is the most massive building on the planet, at least double the volume and thirty times the mass of the Empire State Building. Because it is aligned with the true cardinal points of the compass even though no compass is known to have existed at the time of construction. Because its masonry weighing up to seventy tons is spliced ​​to the fiftieth of an inch. Because the stones of its casing were polished to the standards of modern optical work. Why was such an enormous undertaking, combined with such incredible precision, deemed necessary for the construction of a simple tomb and funerary ornament for a dead king who never occupied it? It's a huge undertaking for such a seemingly useless building - a building that is believed by most to be the home of a dead pharaoh. But there are other reasons to wonder why the Great Pyramid and indeed why any of the thirty or so pyramids was built, beyond its immense size, features and effort that must have gone into its construction. There are numerous theories speculating about its "true" or other functions. Is the Great Pyramid an astronomical observatory, a massive public works project, the Bible written in solid stone, a prophetic work, or an energy collector? Who designed and built the Great Pyramid? God, Thoth, a past civilization, or space aliens? It is these questions that will be examined so that we can gain a better understanding of why seemingly enormous feats of pyramid building were ever carried out. Why some believe that the Great Pyramid (or the pyramid of Pharaoh Khufu or Cheops) at Ghiza was designed with clear mathematical connections between the dimensions of the Pyramid and the Ea......center of paper...... res. The Pyramids. New York: Hippocrene Books, 1988. De Jager, Cornelius. "Adventures in Science and Cyclosophy." Skeptical Inquirer, Winter 1992. Hadingham, Evan. “Pyramid schemes.” The Atlantic, November 1992. Hamblin, Dora Jane. "A unique approach to unlocking the secrets of the great pyramids." Smithsonian April 1986 .Lemesurier, Peter. The Great Pyramid Decoded. Longmead: Element Books Ltd.: 1989.Mendelssohn, Kurt. The enigma of the pyramids. New York: Praeger Publishers: 1974.Stiebing, William H. Jr.. Ancient Astronauts, Cosmic Collisions, and Other Popular Theories of Man's Past. Buffalo: Prometheus Books: 1984.Tompkins, Peter. The secrets of the Great Pyramid. New York: Harper & Row: 1971. Works consulted Trachtenberg, Marvin. Architecture from Prehistoric to Postmodern New York: Hary N. Abrams, Inc.: 1986.