Old Kingdom.
The pyramids were built to protect the body of the dead pharaoh. Pyramids were built until the Egyptian middle kingdom ended. (c.1550BC) ~ Bye...'!
The pyramids that you are talking about were built to hold the remains of dead Egyptian (and other) pharoahs.
Pyramids were built from the 3rd dynasty (c.2650BC) during the Old Kingdom until about 1550BC the end of the Middle Kingdom.
During the Old and Middle Kingdoms (approx. 2650-1550BC)
Many pyramids were built during the old kingdom
No there is no record outside the Bible for the Hebrews to have been slaves in Egypt. If they were then it was in the New Kingdom about 1,000 years after the Giza pyramids were built.
A good question would be: Who built the pyramids?
They were built as tombs.
The Pyramids of Giza (including the Great Pyramid) were built during the Old Kingdom. Most pyramids were built during the Old and Middle Kingdoms.
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).
Slaves didn't build the pyramids, and no.
Pyramids were built during the Old and Middle kingdoms (c.2650-1550BC)