From Djoser to Cheops, the pyramids gradually increase in size, that of Chephren, Cheops successor in only 1/10 the volume of that of Cheops. Chephren's pyramid is but little small than Cheops's, while those of Mycerinus of the IVth Dinasty, do not exceed in size that of Chephren. The smallness of the pyramid can be explained by a rift in the reigning family, but the case of Mycerinus can only be explained by some economic condition which rendered it impossible for those later kings to obtain the enormous amount of labour which was available for the earlier kings. The fact that the records of the reign of Cheops, Chephren and Mycerinus are missing from the Palermo stone. The pyramids were Considered one of the Seven Wonders of the Ancient World. These pyramids were constructed to be the tombs for the pharaohs. Their construction has lasted for generations and required the labor of tens of thousands of bricklayers. They were already considered ancient monuments when Herodotus visited Egypt. The first one for Cheops, The second for Chephren and the last one for Mikerinus. Each pyramid was covered with plates of limestone, reflecting the sun, concealed in the eyes of the robbers entered the building. At the top, a golden capstone was shining brightly. All this has disappeared. As in the pyramids, the actual burial chambers become less complex. Soon a single chamber fulfils all purposes. The approaches are somtimes passages sloping down from the north but we also find stairways, then a combination of stairs and shaft. The Great pyramid of Giza, its height by that ofb the Eiffel Tower and certain American skyscrapers