Slaves did not build the pyramids. Paid workers did.
All verified. From http://skeptoid.com/episodes/4191
“The biggest and most obvious evidence — the pyramids themselves — are an easy starting point. Their age is well established. The bulk of the Giza Necropolis, consisting of such famous landmarks as the Great Pyramid of Cheops and the Sphinx, are among Egypt’s oldest large pyramids and were completed around 2540 BCE. Most of Egypt’s large pyramids were built over a 900 year period from about 2650 BCE to about 1750 BCE.
We also know quite a lot about the labor force that built the pyramids. The best estimates are that 10,000 men spent 30 years building the Great Pyramid. They lived in good housing at the foot of the pyramid, and when they died, they received honored burials in stone tombs near the pyramid in thanks for their contribution. This information is relatively new, as the first of these worker tombs was only discovered in 1990. They ate well and received the best medical care. And, also unlike slaves, they were well paid. The pyramid builders were recruited from poor communities and worked shifts of three months (including farmers who worked during the months when the Nile flooded their farms), distributing the pharaoh’s wealth out to where it was needed most. Each day, 21 cattle and 23 sheep were slaughtered to feed the workers, enough for each man to eat meat at least weekly. Virtually every fact about the workers that archaeology has shown us rules out the use of slave labor on the pyramids.”