when was the first stone pyramid built in egypt
Egyptian pyramids The earliest known Egyptian pyramids are found at Saqqara, northwest of Memphis. The earliest among these is the Pyramid of Djoser (constructed 2630 BCâ€“2611 BC) 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.[6]
Arch The ancient Romans learned the arch from the Etruscans, refined it and were the first builders to tap its full potential for above ground buildings:
Egypt Prior to the construction of the Aswan Dam, the Nile flooded annually (colloquially The Gift of the Nile) replenishing Egypt's soil. This gave Egypt a consistent harvest throughout the years.
Pyramid of Djoser This first Egyptian pyramid consisted of six mastabas (of decreasing size) built atop one another in what were clearly revisions and developments of the original plan. The pyramid originally stood 62 metres (203 ft) tall, with a base of 109 m × 125 m (358 ft × 410 ft) and was clad in polished white limestone.[2] The step pyramid (or proto-pyramid) is considered to be the earliest large-scale cut stone construction,[3] although the pyramids at Caral in South America are contemporary and the nearby enclosure known as Gisr el-Mudir would seem to predate the complex.