The construction of the Great Pyramid of Giza was concluded in 2560 BC.
Because they stopped building pyramids mummies were placed in hidden tombs in the Valley of Kings.
Pyramids are not being built today. And you have not said who they are.
the pyramids were built predominantly in the old and middle kingdom periods, with the last of the pyramids being built by king Ahmose (the first ruler of the new kingdom period).
Underground tombs began to be used during the Middle Kingdom. This was when the pyramids stopped being built due to resources and finances.
For the Pharaoh tombs
The pyramids were stopped being built because of three reasons. 1. to much time 2. to much money 3. tomb robbers found the pyramids easily and this led to them being robbed
Khufu
The true pyramids were built by the Jewish people who were being enslaved by the Egyptians.
they were step pyramids built out of stone
The pyramids were built in the Kingdom of Egypt.
2600-2480 b.c
it appeared in ancient Egypt when the pyramids were being built