 This layout is known as "Bent Axis", After the burial the upper corridors were meant to be filled with rubble and the entrance to the tomb hidden.After the Amarna Period, the layout gradually straightened, with an intermediate "Jogged Axis" (the tomb of Horemheb, KV57 is typical of this layout and is one of the tombs that is sometimes open to the public), to the generally "Straight Axis" of the late Nineteenth and Twentieth Dynasty tombs (Ramesses III's and Ramesses IX's tombs, KV11 and KV6 respectively).As the tombs' axes straightened, the slopes also lessened.