Ancient Egyptian architecture did not become what we think of today until roughly 2649 BCE. Structures that survived the Old Kingdom, which lasted until about 2150 BCE, include mastabas, the Great Pyramids and the Great Sphinx. All of these structures were built from stone.
The earliest example of a burial pyramid in Ancient Egypt was the step pyramid, which was stacked in such a way that the sides formed steps. The first known of these was the Pyramid of Djoser, designed by Djoser's vizier Imhotep and constructed around 2667 to 2648 BCE. This large structure, like those to come after it, was not a simple tomb. It was surrounded by a burial complex that contained other structures.