The Mona Lisa
Leonardo da Vinici, no that's not a typo, is well known for his usage of the Fibonacci Sequence. One notable example is his most famous work, The Mona Lisa. Da Vinci utilized the sequence with the Golden Spiral, which stems from the Perfect Rectangle. The Perfect Rectangle is formed by creating rectangles within the corresponding dimensions of 1.618, from each descending Fibonacci Number (8, 5, 3, 2, 1, etc.) The spiral comes from touching each side in the Perfect Rectangle. The Golden Spiral can best be seen in the shell of a Nautilus.
So how exactly did Leonardo da Vinci go about utilizing the Golden Spiral? First, he uses it to frame the woman in the painting. The spiral begins at her left wrist then travels to the background of the image, which contrasts the beauty of her face. It then skims over her forehead and continues turning until it kisses her chin. It rises, going past the slight of her dimple. Lastly, it completes one rotation which ends at the tip of her nose.
When making eye contact with someone, the ideal place to look is actually their nose, as it centers the face. And with the Mona Lisa, once ease your focus, you immediately notice the eyes. Her most remarkable feature that follows you everywhere you go...