It was used store things like tombs and treasure.
The Aztecs used a technique called "talud-tablero," where they built up the pyramid's core with stacked stones or mud bricks before facing it with slabs of stone. This created the stepped-pyramid shape that we associate with Aztec architecture. The pyramid's exterior was often adorned with carvings and sculptures to honor gods or commemorate important events.
Ziggurat
there are step pyramids, bent pyramids, normal pyramids and more
Step Pyramids have an opening or entrance gate just like regular pyramids.
I believe that they were changed because of the pharoah's
they were step pyramids built out of stone
Step pyramids are similar in shape to smooth pyramids. They are made by gradually inclined steps that taper in to reach the top center stone.
A step pyramid is a pyramid with steps on the side.
Imhotep.
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Pharaoh Zozer, or more commonly Djoser, is famous for building the first pyramids in Ancient Egypt. They were step pyramids used as tombs, and it is thanks to him why pyramids are considered the icon of Ancient Egypt.
Pyramids were build for the purpose of protecting the pharaoh it was built for, and all of his belongings that will be spiritually passed down with him to the afterlife. Step pyramids symbolized a walkway to heaven that spirits used to gain access to the afterlife.