Dahschur 4.8

Dahshur is a royal necropolis located in the desert on the west bank of the Nile approximately south of Cairo. It is known chiefly for several pyramids, two of which are among the oldest, largest and best preserved in Egypt, built from 2613–2589 BC.PyramidsBuilding the Dahshur pyramids was an extremely important learning experience for the Egyptians (who were transitioning from step-sided to smooth-sided pyramids) before they could build the Great Pyramid of Giza. Two of the Dahshur Pyramids, The Bent Pyramid and the Red Pyramid, were constructed during the reign of Pharaoh Sneferu (2613-2589 BC). The Bent Pyramid was the first attempt at a smooth-sided pyramid but ultimately wasn't successful. One design flaw was that there was a very unstable base for it made of desert gravel and clay that has the tendency to subside when a large amount of weight is put on top of it. Another design flaw in this pyramid is that the engineering of it consisted of the blocks being cut in such a way that the weight angles down, causing all of the weight of the pyramid to push down towards the center. This in turn is thought to be the reason the pyramid is "bent" and changes angles about halfway up the sides. Sneferu was not pleased with this pyramid, so he built another called the Red Pyramid. Getting its name from the red hue the pyramid gives off after a nice rain, the Red pyramid was the first true smooth-sided pyramid. Standing more than 30 stories tall, it is thought to be Sneferu's pride and glory and the place where he is believed to be buried. The Red pyramid was the largest smooth-sided pyramid standing until Sneferu's son, Khufu, outdid his father by building the Great Pyramid of Giza, which stands 490 feet tall. Though Khufu's pyramid is larger, he would not have been able to build it without the knowledge that his father discovered before him.