Southern Mazghuna Pyramid

29.4500°N, 31.2167°E.

Late Twelfth- or early Thirteenth-Dynasty pyramid at Mazghuna, south of Dahshur, attributed in some sources to Amenemhat IV (c. 1815–1806 BCE) but with no inscriptional evidence to confirm the king. Original base approximately 53 metres per side; original height unrecovered, the superstructure having been almost entirely robbed in antiquity. Excavated by Ernest Mackay for Flinders Petrie in 1910 and 1911. The substructure preserved a sliding-roof burial chamber of quartzite directly modelled on the Hawara design, accessed through a complex maze of dead-end corridors and portcullis stones. The mortuary temple foundations were laid but never finished. The pyramid was either abandoned mid-construction, completed and immediately stripped, or built by a king whose three-year reign ran out before the casing went on.

The southern of the two Mazghuna pyramids, attributed to a king whose name nobody has ever found inscribed on it, in a substructure copied stone-for-stone from his predecessor's burial vault.