Answer by
dpboris (383)
The oldest pyramidal structures were called ziggurats, and were built in the Mesopotamian valley (modern Iraq and Iran) by the Sumerians, Babylonians, and Assyrians. The first Egyptian pyramid is the pyramid of Djoser, a step-pyramid built in the 27th century BC. The first sloped (or "true") pyramid was built for King Snefru at Medium, in the 26th century BC.