This site is not the best for quantity of information but it has some amazing images and 'walk-throughs.' It also has many physical dimensions of the pyramid.
The largest pyramid ever built, it incorporates about 2.3 million stone
blocks, weighing an average of 2.5 to 15 tons each. It is estimated that the
workers would have had to set a block every two and a half minutes.
Not a primary source but ive read the contents page and gives information on pretty much the whole starting points of democracy. Not sure how great it is.