Who built the pyramids in ancient egypt?

Mostly workers, they would work for 3 months and then have 3 months off I believe (might not be correct). I do not think that it was slaves, just lower class workers. I learned this 6 years ago so this might not be correct!

1 > george s. boutwell

2 > general ulysses s. grant

3 > james a. garfeild

4 > adolph e. borie

yes has peoplewith high ranks that you answer stufff

plzzz give brainlest and me