Built during a time when Egypt was one of the richest and most powerful civilizations in the world, the pyramids —especially the Great Pyramids of Giza— are. The ancient Egyptians built pyramids as tombs for the pharaohs and their queens. The pharaohs were buried in pyramids of many different shapes and sizes. The pyramids are the stone tombs of Egypt's kings - the Pharaohs and one of the world's greatest historical mysteries. They have stood for thousands of years. Unlocking the Secrets of the Pyramids Robert Bauval Broadway Books 22 August Price: In the later Old Kingdom pyramids, beginning with that of King Unas B. The Sphinx stands in front of all the pyramids in Giza. What guards the pyramids? This site, halfway between Giza and Abu Sir, is the location for two unfinished Old Kingdom pyramids.