Enoch, under the inspiration of the Most High, and in obedience to the instructions which he had received in a vision, built a temple under ground on Mount Moriah, and dedicated it to God. His son, Methuselah, constructed the building, although he was not acquainted with his father's motives for the erection. This temple consisted of nine vaults, situated perpendicularly beneath each other, and communicating by apertures left in each vault. Enoch then caused a triangular plate of gold to be made, each side of which was a cubit long; he enriched it with the most precious stones, and encrusted the plate upon a stone of agate of the same form. On the plate he engraved the true name of God, or the tetragrammaton, and placing it on a cubical stone, known thereafter as the Stone of Foundation, he deposited the whole within the lowest arc. When this subterranean building was completed, he made a door of stone, and attaching to it a ring of iron, by which it might be occasionally raised, he placed it over the opening of the uppermost arch, and so covered it that the aperture could not be discovered. Enoch himself was not permitted to enter it but once a year, and after the days of Enoch, Methuselah, and Lamech, and the destruction of the world by the deluge, all knowledge of the vault or subterranean temple, and of the Stone of Foundation, with the sacred and ineffable name inscribed upon it, was lost for ages to the world.