Southern Mazghuna pyramid

The Southern Mazghuna Pyramid is an ancient Egyptian royal tomb which was built during the 12th or the 13th Dynasty in Mazghuna, 5 km south of Dahshur, Egypt. The building was never finished, and is still unknown which pharaoh was the owner, since no appropriate inscription have been found.

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

Source: Wikipedia