The term "sacred geometry" alludes broadly to the geometry employed building temples, religious structures, or—in the case of Ancient Greece—theaters. Its specific phenomena and properties have been most famously recognized in the Pythagorean harmonies (e.g., the Golden Mean), Kepler's platonic solids, and Fibonacci's sequence. This basic line of thought holds that the order of the universe both definitively exists and has geometric underpinnings and properties that man may divine.

"What is God? He is length, width, height, and depth."—St. Bernard of Clairvaux, On Consideration