English: Layout of Djedkare Isesi's substructure. In order: 1) North chapel; 2) Descending corridor; 3) Vestibule; 4) Granite portculli; 5) Granite portcullis; 6) Antechamber; 7) Serdab; 8) Burial chamber; 9) Sarcophagus. Based on Lehner, Mark (2008) The Complete Pyramids New York: Thames & Hudson. ISBN 978-0-500-28547-3 p. 153 for 1-4, 6-9; Miroslav, Verner (2001) The Pyramids: The Mystery, Culture and Science of Egypt's Great Monuments New York: Grove Press. ISBN 978-0-8021-1703-8 p.326 for 5.