" The quantity of stone that had to be quarried, hauled, and hoisted into place in the Great Pyramid becomes even more impressive when it is compared with other civil engineering feats, whether real or imagined. It has been stated that it contains more stone than that used in all the churches, cathedrals, and chapels built in England since the time of Christ. Thirty Empire State Buildings could be built with the estimated 2,300,000 stones. A wall three-feet high and one-foot thick could be built across the United States and back using the amount of masonry contained in the Great Pyramid. "

― Christopher Dunn , The Giza Power Plant: Technologies of Ancient Egypt