Indian architecture followed principles of vastu shastra, aligning buildings with cosmic movements. Cities like Harappa and Mohenjo-Daro were precisely planned using mathematical drawings. Jaipur's design was based on a nine-square mandala representing the universe, with the royal palace at the center. Ancient Greek architectural orders like Doric, Ionic, and Corinthian influenced styles worldwide, and the golden ratio of 1.618 was incorporated into designs like the Parthenon and buildings as diverse as the Taj Mahal and United Nations headquarters.