Pyramid of Amenemhat III (Dahshur)

The pyramid was built with an east–west orientation and has two entrances located on the south-eastern and south-western corners.

The core of the superstructure was of mud brick with no internal walls; possibly a weight saving measure considering how close the pyramid was to the Nile. The pyramid was, however, built on clay that was incapable of supporting its weight and it began to sink, just as the Bent Pyramid of Sneferu at Dashur had done centuries before. The two pyramids are approximately 1.5 km apart.

The outer cladding of limestone 'veneer' was held together with dovetail pegs, following the style of his father's tomb. The finished dimensions were approximately 200 cubits per side and 150 cubits high.

Pyramidion (capstone) at Egyptian Museum, Cairo

The pyramidion (capstone) was covered with inscriptions and religious symbols. Some of these were later scratched off, leading researchers to conclude that the pyramidion was either never used or was defaced during Akhenaten's rule.

Below ground level in the subterranean structure lay a network of complicated passages. The 'King's section' remains mostly intact with a sarcophagus and canopic jar; however, the king was not buried there. The 'Queen's section' was broken into by robbers and looted. There are four other burial chambers in the subterranean structure; to whom they belong, however, is unknown. Two are thought to belong to King Amenemhet IV and queen Sobekneferu.

As the pyramid sank, it began to crush the chambers located beneath it. The builders tried hastily installing supporting beams and mud brick walls to stop the sinking, but this final effort was unsuccessful and the pyramid was ultimately abandoned. The 'King's section' contained a burial chamber containing a large sarcophagus that was carved to imitate the outer wall of Djoser's Pyramid complex at Saqqara, possibly another attempt to reinforce the legitimacy of his rule.

Burial chambers for two of his queens were created beneath the pyramid; the first chamber of the 'Queen's section' under the south-western quadrant of the pyramid was for Queen Aat and the second chamber was for an unnamed queen. Although both chambers had been entered and looted in antiquity, archaeologists found many items overlooked by the looters, including one of Queen Aat's canopic jars.

Queen Aat's chamber contained a sarcophagus similar to the king's. The causeway was unusually wide with a large open area. There were houses on the northern side of the causeway that have been identified as priest's houses.

By the 13th Dynasty, a lack of security led to local inhabitants using the Valley Temple as a granary and the pyramid being looted for the first time. There is evidence of restoration work perhaps 100 years later, when King Auibre Hor and his princess Nubhetepti-khered were buried in two of the ten shaft tombs on the northern side of the outer enclosure.[1]