Transcription: Who built the pyramids? Most experts believe that it took 100,000 men 20 years to build Khufu's pyramid. Some believe that as few as 10,000 men were needed. Farmers and craftsmen from all over Egypt were summoned by the pharaoh to work on the pyramid for the four months each year when the fields were flooded by the Nile. At this time of year, there was little farm work to be done. Women and children stayed at home to take care of the lifestyle. Wealthy men and officials were also involved in building the pyramids. An architect designed each pyramid. Scribes measured and counted stones. Governm ...