Built when the dinosaurs roamed and the docile ones were used to lift heavy stones (think Flintstones without women) when gravity was less than it is now and the earth spun faster. When fallen angels still thought they could fly but were only trapped by their ignorance of God and the atmospheric layers protecting the earth. And the leader said he would make the Son of God his pet if he ever showed up its not a sphinx it's the lion of the tribe of Judah.