Pyramid of Djoser

The earliest Egyptian pyramids were step pyramids. During the Third Dynasty of Ancient Egypt (27th century BC), the architect Imhotep built Egypt's first step pyramid, the Pyramid of Djoser, by building a series of six successively smaller mastabas (an earlier form of tomb structure), one atop of another. Later pharaohs, including Sekhemkhet and Khaba, built similar structures. The first step pyramid was built for Djoser (or Zoser).

But, by the time of the Fourth Dynasty, plans had changed into the transformation of the "true pyramid". The earliest smooth-sided pyramid, located at Meidum, started out as a step pyramid under Huni structure. Sneferu's own later monuments, the Bent Pyramid and Red Pyramid at Dahshur, were the first true pyramids to be built as such from scratch, and it was with this innovation that the age of Egyptian stepped pyramids came to an end.