Φ (Phi), the 21st letter of the Greek alphabet, unveiled by Pythagoras in the 6th century BCE, is known as the Golden Ratio.

This mysterious harmony weaves through the pyramids, the Parthenon, the nautilus shell, and the Mona Lisa—nature’s wonders and humanity’s masterpieces.

As a symbol of enduring wisdom, it embodies the essence of beauty and science, revealing a hidden balance between emotion and reason, and the timeless truth of rational beauty.