It might be just an entirely fictional thing. Or it might be some artifact from one of our civilizations that was stolen and then was lied about what it was. It may be a worthless box, or it may be something older. I don't think it is very important, and try not to become like the christians and jews who pour their energy into thought forms surrounding that box. It is better to look at what is being discovered in Egypt, or evidence of our previous Golden Age Civilization in other places around the world.