The Gyza Pyramids in Egypt were built by the Atlantans survivors after their Atlantis civilization was destroyed by fighting among themselves.
The Atlanteans were hybrids (called Estekna-Manés) created of the mix of people from earth and extraterrestrials that didn't follow the cosmic plan of not interfering with our humanity's natural evolution.
After a period of harmony in their civilization, there were divisions, and finally the fall of Atlantis occurred about 10,000 and 12,000 years ago.
They had a higher technology than ours but their negative human's tendencies eventually led to a war between factions. Such negativity brought down one of our moons and hit earth in the ocean creating chaos on earth.
Earth began to oscillate in an unstable matter so the survivors decided to create pyramids that will balance the cosmic energy with the earth's energy and balance the oscillation to a normal level. This was around 10 -12 thousand years ago. Much before Egypt existed.
The Atlanteans built the pyramids using their mental powers and high technology. After the pyramids helped to balance earth's wobbling, the top element part of the pyramids (made of rock crystals) were removed and stored.
The pyramids align with the stars in Orion's Belt as these stars appeared in 10,000 BC.
Many of the survivors realized the damage that was created by their negativeness and decided to change their attitude and help other civilizations in the world with some of their superior knowledge.
Few of their survivors an descendents are known in history such as Hermes Trimegistros , Noah and Merlin.
We know one of the Atlantean descendents that joined the White Brotherhood on Earth: the Master Alcir, Regente and custodian of information in Paititi, Peru.
The White Brotherhood saved the Atlantean technology and is buried in different places on earth to be given to our humanity later on when we are ready to receive it, when we stop destroying ourselves and our mother earth.
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Orion correlation theory
It posits that there is a correlation between the location of the three largest pyramids of the Giza pyramid complex and Orion's Belt of the constellation Orion, and that this correlation was intended as such by the original builders of the Giza pyramid complex. The stars of Orion were associated with Osiris, the god of rebirth and afterlife by the ancient Egyptians. Depending on the version of the idea, additional pyramids can be included to complete the picture of the Orion constellation, and the Nile river can be included to match with the Milky Way.
The basis of this idea concerns the proposition that the relative positions of three main Ancient Egyptian pyramids on the Giza plateau was by design correlated with the relative positions of the three stars in the constellation of Orion which make up Orion's Belt, as these stars appeared in 10,000 BC.
Link:
https://en.m.wikipedia.org/wiki/Orion_correlation_theory
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Sphinx water erosion hypothesis
In the 1950s, French mystic[9][10] and alternative Egyptologist Schwaller de Lubicz speculated the body of the Sphinx to be eroded by deluges and that therefore the Sphinx must predate them, further claiming that ancient Egyptian knowledge originated from colonists or refugees of Plato's sunken continent of Atlantis.
In 1979, author and alternative Egyptologist John Anthony West, inspired by Schwaller's ideas, attributed the erosion to Nile floods between 15,000 and 10,000 BC. By denying the existence of any evidence for the development of Egyptian civilization prior to the first dynasty, West created room to inject the idea of a lost, advanced civilization of Atlanteans who created the Sphinx and passed on their knowledge to the dynastic Egyptians.
Ten years later, West sought the opinion of geologist Robert Schoch to validate his claims. In 1990 they traveled together to Egypt, visiting the Sphinx. The following year Schoch formulated and presented his version of the hypothesis,[12] purposely avoiding the use of the word "Atlantis". He originally estimated the Sphinx to have been created before 5000 BC, later pushing his minimum estimate further back to 9700 BC, once again aligning it with Plato's lost civilization of Atlantis.
Link:
https://en.m.wikipedia.org/wiki/Sphinx_water_erosion_hypothesis
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The Sphinx enclosure exposes a severe flood that took place during the Younger Dryas period. Geologist like Professor Robert Shock date the Sphix back to at least 13,000 years based on the weathering pattern of the stones inside the enclosure.
Nina . CC BY 2.5
Hajotthu . CC BY 3.0
Representation of the central tenet of the Orion correlation theory: the outline of the Giza pyramids superimposed over a photograph of the stars in Orion's Belt. Hypnôs • CC BY-SA 4.0
Orion's Belt superimposed on the Giza pyramid complex, illustrating the Orion Correlation Theory. From left to right: Alnitak on the Great Pyramid of Giza Alnilam on the pyramid of Khafre Mintaka on the pyramid of Menkaure. NASA, Rogelio Bernal Andreo, cmglee • CC BY-SA 4.0
The Great Sphinx of Giza
Hesham Ebaid • CC0