1-The Great  Pyramid of Cheops

Khufu whose father  Sneferu had erected the first true Pyramid( The Great Pyramid) at Giza Plateau. It was constructed from 3,200,0000 blocks of Limestone, each weighing an average of 2.5 tons. It differs from most Pyramids in having two burial Chambers within the built structure and a third unfinished chamber below the ground.