Square Root of Five — 2.236 : 1 — the Double Square

The Double Square is found in some of the best known sacred spaces in the world, from the King's Chamber in the Great Pyramid and Solomon's Temple in the Bible to the interior of Calendar II, an important underground stone chamber in Vermont, USA.

The diagonal of a double square is to the shorter side as the square root of five is to one. The square root of five = .618 + 1 + .618.

Solomon's Temple provides numerous examples of sacred geometry. The holy place (EFCD) is the place where good Jews who had been properly cleansed could go. This space measures twenty cubits by forty cubits.