The changes in pyramid design were due to a number of factors, including:
* Engineering knowledge: The ancient Egyptians' engineering skills improved significantly over time, allowing them to build larger and more complex structures.
* Political power: As the pharaohs became more powerful, they were able to command greater resources and labor for their building projects.
* Religious beliefs: The ancient Egyptians believed that the pharaohs were divine beings who needed to be buried in grand tombs that would protect their bodies and spirits in the afterlife.
Some of the key differences in pyramid design include:
* Size: The pyramids grew in size over time, from the relatively small Step Pyramid of Djoser to the massive Great Pyramid of Khufu.
* Shape: The pyramids also evolved in shape, from the stepped shape of the early pyramids to the smooth-sided pyramids of the later periods.
* Materials: The early pyramids were built with mud bricks, while the later pyramids were built with limestone blocks.
* Construction techniques: The construction techniques also improved over time, with the later pyramids being built with more precision and accuracy.