The designs of the pyramids of ancient Egypt evolved over time; they had connections with the ancient myths, legends, and with the stars as they were in ancient times. When pyramid dimensions are converted to 'cubits' and 'seked,' revealing relationships emerge that were obscured by using using modern units. All of the energy of building came from manpower, courtesy of the energy consumed in the workers' food and drink. The mathematics of ramp construction, and of the use of ramps to convey stones at the phenomenal rates apparently achieved, challenge pet theories of construction. Most captivating is a study of the culture of the builders, evidenced in models of villages and farms, scenes of food preparation, toys, statues, magic, and tomb art.