The document discusses the pyramids of Egypt, including how they were built and who built them. It notes that the oldest pyramids were step pyramids built in 2630 BCE for Pharaoh Djoser. The Egyptians, including many who willingly worked, built the pyramids for their pharaohs, who were considered divine rulers and needed protection for their bodies after death. Details are provided on the Great Pyramid, the largest pyramid built around 2550 BCE, and the Bent Pyramid, possibly the first attempt at a classic pyramid design.