Pyramids built by older civilization that the Egyptians?

[Exist]

Hi,

Gobekli Tepe proves that there were advanced civilizations with knowledge of astronomy and architecture around the time of the Younger Dryas period 11,600 - 12,800 years ago. There is much about the Sphinx as well as the Great Pyramids, that suggests that they were restoration projects undertaken by the ancient Egyptians but that their construction originally took place far earlier than that (angle of the upward shaft in the Khufu pyramid that aligns with certain constellations specific to that precessional era). I playfully but sincerely contest the historical validity of this game. Thank you.