used to fill it (sand on the outside and limestone on the inside). The weather caused the sand to erode from it, but the limestone was taken intentionally for use on other pyramids allowing the pyramid to collapse and ultimately desecrating the tomb of King Amenemhat II.

King Senusret III (1878-1839 BC) had his pyramid built within Dahshur. The difference between his pyramid in comparison to those surrounding it was that King Senusret III had tombs and galleries built underneath