The Great Piramid of Giza, a monument of wisdom and prophecy, was built as a tomb for Pharaoh Cheops in 2720 B.C. Despite its antiquity, certain aspects of its contructions make it one the truly great wonders of the world. The four sides of the pyramid are aligned almost exactly on the truth north, south, east, and west-an incredible engineering feat. The ancient Egyptians were sun worshipers and great astronomers, so compulations for the Great Pyramid were based on astronomical observations.