Today we have secret organizations who pretend to know something about the Great Pyramid. This is nothing more than political gamesmanship. The Sleeping Prophet, Edgar Cayce goes into great detail on the origins of the Pyramid. Other information is contained on the Sumerian clay tablets. The tablets reveal a time of war between two factions of the Annunaki. The Enlil faction and the Enki faction.
Enki, the son of Antu and Ninurta, the grandson of Antu engage in bitter warfare. Let us take a look at some of the information surrounding these events:

The verses describing this aspect of the war are damaged on the tablets of the main text; details are, however, available from various other fragmented tablets that deal with the "overwhelming of the land" by Ninurta," a feat whereby he earned the title "Vanquisher of Meslam." In these battles the attackers resorted to chemical warfare. We read that Ninurta rained on the city poison bearing missiles, which "he catapulted into it; the poison, by itself, destroyed the city."
Those who survived the attack on the city escaped to the surrounding mountains. But Ninurta "with the Weapon That Smites threw fire upon the mountains; the godly Weapon of the Gods, whose Tooth is bitter, smote down the people." Here, too some kind of chemical warfare is indicated.

The Weapon Which Tears Apart
robbed the senses;
The tooth skinned them off
Tearing-apart he stretched upon the land;
The canals he filled with blood,
in the Enemyland for dogs like milk to lick.

"Recalling the heroic feats of Nergal in this war, the texts relate how, as the other gods found themselves hemmed in within the Giza complex, Nergal-:Lofty Dragon Beloved of Ekur"- at night stole out" and, carrying awesome weapons and accompaniedby his lieutenants, broke through the encirclement to reach the Great Pyramid (the Ekur). Reaching it at night, he entered through "the locked doors which by themselves can open." A roar of welcome greeted him as he entered."
"But high hopes of the beseiged gods were soon dashed. We learn more of the last phases of this Pyramid War from yet another text, pieced together by George A. Barton (Miscellaneous Babylonian Texts) from fragments of an inscribed clay cylinder found in the ruins of Enlil's temple in Nippur.
As Nergal joined the defenders of the Great Pyramid ("the Formidable House Which Is Raised Up Like a Heap")" he strengthened its defenses through various ray-emitting crystals (mineral "stones") positioned within the pyramid."
"The Water-Stone, the Apex-Stone, the...-Stone, the ....lord Nergal increased its strength.
The door for protection he...
To heaven its Eye he raised,"

ENKI SURRENDERS

"Nowadays the visitor to the Great Pyramid finds its passages and chambers bare and empty, its complex inner construction apparently purposeless, its niches and nooks meaningless.
It has been so ever since the first men entered the pyramid. But it was not so when Ninurta had entered it--circa 8670 B.C. according to our calculations. "Unto the radiant place," yielded by its defenders, Ninurta had entered, the Sumerian Text relates. And what he had done after he had entered changed not only the Great Pyramid from within and without but also the course of human affairs."
"When, for the first time ever, Ninurta went into the "House Which Is Like a Mountain," he must have wondered what he would find inside. Conceived by Enki/Ptah, planned by Ra/Marduk, built by Geb, equipped by Thoth, defended by Nergal, what mysteries of space guidance, what secrets of impregnable defense did it hold?"
"In the smooth and seemingly solid north face of the pyramid, a swivel stone swung open to reveal the entranceway, protected by the massive diagonal stone blocks, just as the text lauding Ninharsag had described. A straight Descending Passage led to the lower service chambers where Ninurta could see a shaft dug by the defenders in search for subterranean water. But his interest focused on the upper passages and chambers; there, the magical "stones" were arrayed-minerals and crystals, some earthly, some heavenly, some the likes of which he had never seen. From them were emitted the beamed puslations for the guidance of the astronauts and the radiation for the defense of the structure."
"Escorted by the Chief Mineralmaster, Ninurta inspected the array of "stones" and instruments. As he stopped by each one of them, he determined its destiny-to be smashed up and destroyed, to be taken away for display, or to be installed as instruments elsewhere. We know of these destinies and the order in which Ninurta had stopped by the stones, from the text inscribed on tablets 10-13 of the epic poem Lugal-e. It is by following and correctly interpreting this text that the mystery of the purpose and function of many features of the pyramid's inner structure can be finally understood."
"Going up the Ascending Passage, Ninurta reached its junction with the imposing Grand Gallery and Horizontal Passage. Ninurta followed the horizontal passage first, reaching a large chamber with a corbeled roof. Called the "vulva" in the Ninharsag poem, this chamber's axis lay exactly on the east-west center line of the pyramid. Its emission ("an outpouring which is like a lion whom no one dares attack") came from a stone fitted into a niche that was hollowed out in the east wall (Fig. 39). It was the SHAM (Destiny") Stone. Emitting a red radiance which Ninurta "saw in the darkness," it was the pulsating heart of the pyramid. But it was anathema to Ninurta, for during the battle, when he was aloft, this stone's "strong power" was used to grab to kill me, with a tracking which kills to seize me." He ordered it "pulled out...be taken apart...and to obliteration be destroyed."
"All this, Ninurta announced, he was doing not only for his sake but for future generations, too: "Let the fear of thee" --the Great Pyramid--"be removed from my descendants; let their peace be ordained."
"Finally there was the Apex Stone of the Pyramid, the UL ("High As The Sky") Stone: "Let the mother's offspring see it no more," he ordered. And, as the stone was sent crashing down, "let everyone distance himself," he shouted, The "Stones," which were "anathema" to Ninurta, were no more."
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I find it hardly likely the placing of a skeletal cap on the Great Pyramid has any real significance remotely related to reality. It is simply another display of smoke and mirrors.
To put this in perspective, these are the oldest written records of mankind's existance on the planet. It was not long ago our ancestors believed the earth was flat. The annunaki/nefilim left maps of the solar system naming the third planet from the sun as the seventh planet. It is if you are entering the solar system from outer space!