 During the much later Saite period (664–525 BC), it was used as a cemetery.The entrance of the pyramid was discovered in 1831 by the Italian Egyptologist Orazio Marucchi but was not entered until 8 years later in 1839 by John Shae Perring, who took advantage of an existing tunnel dug into the pyramid by tomb robbers.Perring did not know for sure who the owner of the pyramid was and attributed it to Djedkare Isesi (reign 2414–2375 BC), a late 5th dynasty pharaoh.