Final answer:
Leonardo da Vinci often used the number theme of the Golden Ratio in his artwork to create harmony and beauty.
Step-by-step explanation:
Leonardo da Vinci, a renowned artist, was known to use the number theme of the divine proportion or the Golden Ratio in most of his artwork. The Golden Ratio, approximately equal to 1.618, is a mathematical concept that is often found in natural and aesthetic designs. Da Vinci believed that using this ratio would create harmony and beauty in his compositions, which can be seen in works such as the Mona Lisa and The Last Supper.
Learn more about Leonardo da Vinci's use of the Golden Ratio in his artwork