The Red Pyramid, also called the North Pyramid, is the largest of the three major pyramids located at the Dahshur necropolis. Named for the rusty reddish hue of its stones, it is also the third largest Egyptian pyramid, after those of Khufu and Khafra at Giza. At the time of its completion, it was the tallest man-made structure in the world. It is also believed to be the world's first successful attempt at constructing a "true" smooth-sided pyramid. Local residents refer to the Red Pyramid as el-haram el-watwat, 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 now remain at the pyramid's base on the corner. During the Middle Ages much of the white Tura limestone was taken for buildings in Cairo, revealing the reddish sandstone beneath.
History
It was the third pyramid built by Old Kingdom Pharaoh Sneferu, and is located approximately one kilometer 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 began during the thirtieth year of Sneferu's reign. 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 John Romer, based on this same graffiti, suggests it took only ten years and seven months to build.
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.
Some archaeologists now believe that the Meidum pyramid was the first attempt at building a smooth-sided pyramid, and that it may have collapsed when construction of the Bent Pyramid was already well underway — and that the pyramid may by then have already begun to show alarming signs of instability itself, as evidenced by the presence of large timber beams supporting its inner chambers. The outcome of this was the change in inclination of the Bent Pyramid, and the commencement of the later Red Pyramid at an inclination known to be less susceptible to instability and therefore less susceptible to catastrophic collapse.
The first passageway
The corbelled roof looking west
On the east side the remnants of the Mortuary temple can be seen.
Modern day
The Red Pyramid is 104 metres (341 ft) high. 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 it was apparently intended for.
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. A passage, 3 feet (0.91 m) in height and 4 feet (1.2 m) wide, slopes down at 27° for 200 feet (61 m) to a short horizontal passage leading into a chamber whose corbelled roof is 40 feet (12 m) high and rises in eleven steps. At the southern end of the chamber, but offset to the west, another short horizontal passage leads into the second chamber. This passage was probably closed at one time and the offset was a measure intended to confuse potential robbers.
The second chamber is similar to the first and lies directly beneath the apex of the pyramid. High in the southern wall of the chamber is an entrance, now reached by a large wooden staircase built for the convenience of tourists. This gives onto a short horizontal passage that leads to the third and final chamber with a corbelled roof 50 feet (15 m) high. A body was found. The first two chambers have their long axis aligned north-south, but this chamber's long axis is aligned east-west. Unlike the first two chambers, which have fine smooth floors on the same level as the passages, the floor of the third chamber is very rough and sunk below the level of the access passage. It is believed that this is the work of robbers searching for treasure in what is thought to have been the burial chamber of the pyramid.
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