Who came up with the pyramids and why?

The pyramids, particularly those in Egypt, were built during the Old and Middle Kingdom periods, primarily attributed to the pharaohs as monumental tombs for themselves. The most famous pyramids, including the Great Pyramid of Giza, were constructed around 2580–2560 BCE under Pharaoh Khufu. These structures served both as elaborate burial sites and as symbols of the pharaohs' divine status, reflecting their power and the belief in an afterlife. The construction of pyramids was also a way to unify the workforce and demonstrate the technological and organizational capabilities of ancient Egyptian society.