Northern Mazghuna pyramid

The Northern Mazghuna Pyramid is an ancient Egyptian royal tomb which was built during the 12th or 13th Dynasty in Mazghuna, 5 km south of Dahshur. The building remained unfinished, and it is still unknown which pharaoh was really intended to be buried here since no appropriate inscription has been found.

The pyramid was rediscovered in 1910 by Ernest Mackay and excavated in the following year by Flinders Petrie.

Source: Wikipedia