Sacred geometry involves sacred universal patterns used in the design of everything in our reality most often seen in sacred architecture and sacred art.
The basic belief is that geometry and mathematical ratios, harmonics and proportion are also found in music, light, cosmology. This value system is seen as widespread even in prehistory, a cultural universal of the human condition.
The sacredness of absolutely everything in the universe can be described and explained in terms of geometrical patterns that are handed unto us directly from the universe. The harmony and interconnectivity of all things and the events that happen around them have a hidden geometry.