The golden ratio is an irrational number that approximately equals 1.618. For artistically-minded people, the ratio—or better yet, the divine proportion—might be easier to understand visually. This is easiest to demonstrate with the golden spiral, which is often depicted and constructed within a rectangular frame.
While the result is technically not a truly logarithmic, or “golden,” spiral, it is a close approximation. More importantly, this is the type of process artists have used to visualize and apply the divine proportion to their paintings throughout the centuries. Here are several examples of how the golden ratio can be applied to works from art history.