A Quick Explanation
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.
It is considered foundational to building sacred structures such as temples, mosques, megaliths, monuments and churches; sacred spaces such as altars, temenoi and tabernacles; meeting places such as sacred groves, village greens and holy wells and the creation of religious art, iconography and using "divine" proportions. Alternatively, sacred geometry based arts may be ephemeral, such as visualization, sand painting and medicine wheels.
Sacred geometry may be understood as a worldview of pattern recognition, a complex system of religious symbols and structures involving space, time and form. According to this view the basic patterns of existence are perceived as sacred. By connecting with these, a believer contemplates the Great Mysteries, and the Great Design. By studying the nature of these patterns, forms and relationships and their connections, insight may be gained into the mysteries - the laws and lore of the Universe.
Great Post, and for some harmonics:
Sacred geometry manifested through high vibrations/frequencies as highlighted in Sound, Colors, Numbers, Symbols, Mandalas… is a tool that has been used for thousands of years to reach beyond the physical and awaken the divine within; embedded in the universal torus and crystals constitutes the running system/platform of the universe. Sacred geometry helps us to better understand Creation while still in 3D. Much of this universe has been created through mathematical structure and systems. It is the core-fabric of all realities - the language, the reality algorithm of the universe. Our reality is a geometric hologram insertion of coherent conscious energy – universal torus. So it is imperative we understand that Sacred Geometry is far more than a mathematical branch. It is a living sacred science, an aspect of the science frequency aka Unconditional Love. It is a sacred science that in fact forms the template of our physical duality within linear space and time.