The Eighteenth Dynasty tombs within the valley vary quite a bit in decoration, style, and location. It seems that at first there was no fixed plan. The tomb of Hatshepsut has a unique shape, twisting and turning down over 200 metres from the entrance, so that the burial chamber is 97 metres below the surface. The tombs gradually became more regular and formalised, and those of Thutmose III and Thutmose IV, KV34 and KV43, are good examples of Eighteenth Dynasty tombs, both with their bent axis, and simple decoration.