Phi and the Golden Section in Architecture

Phi (Φ ), the Golden Section, has been used by mankind for centuries in architecture

Its use started as early as with the Egyptians in the design of the pyramids:

The Greeks knew it as the Golden Section and used it extensively for beauty and balance in the design of the Parthenon and other architecture:

Renaissance artists from the time of Leonardo Da Vinci knew it as the Divine Proportion, and used it in the design of Notre Dame in Paris:

Its use continues in modern architecture, as illustrated in the United Nations building: