The document discusses various architectural structures from around the world and through history that incorporate principles of geometry, mathematics, and the golden ratio. Many famous structures like the Parthenon, Taj Mahal, and Notre Dame used proportions and dimensions based on the golden ratio or other mathematical concepts. City planning in ancient India also incorporated mandalas and geometric patterns rooted in cosmological principles. Overall, the document shows how mathematics and principles of structure have long been applied in architectural design around the world.