Why don't you do your own studies on this one. One site from which I quote is really not a study.
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Today, modern engineers would have a hard time transporting a 50 ton block. However, ancient people seemed to have had a way to transport blocks of stone of incredible size with ease.
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Surprisingly, in the vicinity, researchers discovered another huge block of stone partially buried with staggering dimensions: 19.6 meters (64 feet) in length, 6 meters (19.6 feet) in width, and about 5.5 meters (18 feet) in height.
Researchers estimate
that the weight of this huge stone block is around 1,650 tons which would place it as the largest known stone block quarried from antiquity. But why did ancient builders halt its construction?
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‘Impossible’ Ancient Engineering: The Megalithic Stones of Baalbek
According to contemporary history, what is found is not what taught. The sphinx has water erosion, telling us that the civilization that made this is not the Egyptian one. I also remember reading that the inside of the large pyramids have water level marks.
Our taught history is nothing but fancy stuff invented by people who want to have fancy tittles and teach their concept of history which has nothing to do with reality.