Red Pyramid

The Red Pyramid, also called the North Pyramid, is the largest of the pyramids located at the Dahshur necropolis in Cairo, Egypt. Named for the rusty reddish hue of its red limestone stones, it is also the third largest Egyptian pyramid, after those of Khufu and Khafre at Giza. It is also believed to be Egypt’s first successful attempt at constructing a “true” smooth-sided pyramid. Local residents refer to the Red Pyramid as el-heram el-watwaat, meaning the Bat Pyramid. The Red Pyramid was not always red. It used to be cased with white Tura limestone, but only a few of these stones now remain at the pyramid’s base, at the corner. During the Middle Ages much of the white Tura limestone was taken for buildings in Cairo, revealing the red limestone beneath.

History
Outlines of various pyramids overlaid on top of one another to show relative height Comparison of approximate profiles of the Red Pyramid with some notable pyramidal or near-pyramidal buildings. Dotted lines indicate original heights, where data is available. In its SVG file, hover over a pyramid to highlight and click for its article. The Red Pyramid was the third pyramid built by Old Kingdom Pharaoh Sneferu, and was built 2575–2551 BCE. The Red Pyramid is located approximately one kilometre (0.62 mi) to the north of the Bent Pyramid. It is built at the same shallow 43-degree angle as the upper section of the Bent Pyramid, which gives it a noticeably squat appearance compared to other Egyptian pyramids of comparable scale. Construction is believed to have begun during the thirtieth year of Sneferu’s reign (c. 2590 BCE). Egyptologists disagree on the length of time it took to construct. Based on quarry marks found at various phases of construction, Rainer Stadelmann estimates the time of completion to be approximately 17 years while Rolf Krauss, based on this same graffiti, suggests a period of construction of 10–11 years, an estimate later supported by John Romer. Archaeologists speculate its design may be an outcome of engineering crises experienced during the construction of Sneferu’s two earlier pyramids. The first of these, the Pyramid at Meidum, collapsed in antiquity, while the second, the Bent Pyramid, had the angle of its inclination dramatically altered from 54 to 43 degrees part-way through construction.

Modern day
The Red Pyramid is 105 metres (344 ft) high, and 220 metres (720 ft) wide. A rare pyramidion, or capstone, for the Red Pyramid has been uncovered and reconstructed, and is now on display at Dahshur. However, whether it was actually ever used is unclear, as its angle of inclination differs from that of the pyramid for which it was apparently intended. The Red Pyramid, along with the Bent Pyramid, was closed to tourists for many years because of a nearby army camp. It is now usually open for tourists and a somewhat intrusive ventilation has been installed which pipes air down the entrance shaft to the interior chambers. Visitors climb steps cut in or built over the stones of the pyramid to an entrance high on the north side.