Dahshur (in English often called Dashur; Egyptian Arabic: دهشور Dahšūr) is a royal necropolis located in the desert on the west bank of the Nile approximately 40 kilometres (25 mi) south of Cairo. It is known chiefly for several pyramids, two of which are among the oldest, largest and best preserved in Egypt, built from 2613–2589 BC.
Two of the Dahshur Pyramids, The Bent Pyramid and the Red Pyramid, were constructed during the reign of Pharaoh Sneferu (2613-2589 BC).
The pyramid of the 12th Dynasty king Amenemhat II (1929-1895 BC) is now badly damaged. Next to it were found several undisturbed tombs of royal women still containing a large amount of jewellery. The pyramid of Sesostris III was part of a huge complex, with several smaller pyramids of royal women, along with another pyramid to the south. In a gallery tomb next to this pyramid were found two treasures of the king's daughters (Sithathor). The Black Pyramid dates from the later reign of Amenemhat III and, although badly eroded, it remains the most imposing monument at the site after the two Sneferu pyramids.
Read more on Wikipedia