Dome

The oldest pyramid is that of King Sneferu (reg c. 2575–c. 2551 bc), which is the first to have been designed from the start as a true pyramid. The angle of its sides was decreased halfway up, giving it a rhomboidal appearance, hence its name of Bent Pyramid. Inside the pyramid is a complicated system of corridors and portcullises, and some inner chambers have high, corbelled ceilings. Reliefs in the pyramid’s valley temple depict processions of female figures representing Sneferu’s estates throughout the country. The pyramid is still in very good condition, retaining most of its outer casing.diagram, drawing comparing angles and sekeds in the Pyramids of Snefru: Bent Pyramid, Red Pyramid, and Meidum Pyramid