The Egyptian pyramids are ancient pyramid-shaped masonry structures
located in Egypt. There have been 138 pyramids discovered in Egypt
as of 2008. Most were built as tombs for the country's Pharaohs and
their consorts during the Old and Middle Kingdom periods.
The earliest known Egyptian pyramids are found at Saqqara, northwest
of Memphis. The earliest among these is the Pyramid of Djoser
(constructed 2630 BCE–2611 BCE) which was built during the third
dynasty. This pyramid and its surrounding complex were designed by
the architect Imhotep, and are generally considered to be the
world's oldest monumental structures constructed of dressed masonry.