Before the removal of the casing in the middle ages, the pyramid was entered through a hole in the 19th layer of masonry, approximately 17 metres (56 ft) above the pyramid's base level. The height of that layer – 96 centimetres (3.15 ft) – corresponds to the size of the entrance tunnel which is commonly called the Descending Passage.[80][129] According to Strabo (64–24 BC) a movable stone could be raised to enter this sloping corridor, however it is not known if it was a later addition or original.  The original entrance (top-left), Robbers' Tunnel (middle-right)
A row of double chevrons diverts weight away from the entrance. Several of these chevron blocks are now missing, as indicated by the slanted faces on which they once rested.
Numerous, mostly modern, graffiti is cut into the stones around the entrance. Most notable is a large, square text of hieroglyphs carved in honor of Frederick William IV, by Karl Richard Lepsius's Prussian expedition to Egypt in 1842.