Her hair is Harlow gold
Her lips sweet surprise
Her hands are never cold
She's got Bette Davis eyes
Bette Davis Eyes. By Donna Weiss and Jackie DeShannon

In 1503 Leonardo da Vinci ended his association with the murdering and duplicitous Cesare Borgia, meaning he was again without a patron or in today’s vernacular; unemployed and without income. Likely, through a paternal connection, familial duty, and the need for money, he agreed to take a commission from a silk merchant to paint his 24-year-old wife: Lisa del Giocondo nee Gherardini.
He posed her in a seated, half-length, unconventional three-quarter portrait view with a typical Leonardo background of winding rivers, mountains, and misty sky. Her enigmatic smile and follow-you-anywhere eyes are the subject of endless discussions and debates. He employed his now famous, delicate blending of colors with soft edges; “sfumato”, and his almost transparent layering to create what is now considered the archetypical Renaissance art form, and the world’s most famous and valuable painting. Some estimates place the value of the painting somewhere north of one billion dollars.
In predictable fashion, Leonardo never finished the painting. He began the painting in 1503, as confirmed by a margin note in a book dated to that year, and continued working on it until he died in France in 1519 at the age of 67. If you look closely at the painting, you will notice that Lisa does not have any eyebrows or eyelashes although modern science has detected them as being originally there. It is believed that they were removed over time by repeated cleanings, but it is just as likely Leonardo overpainted them with the intent of painting them back on at some later date.
The painting is now on display in the Louvre, having been purchased by the King of France, Francois I, Leonardo’s final patron, shortly after the painter’s death.
Source: Leonardo da Vinci by Walter Isaacson. Published 2017.
Painting from Wikipedia. Public Domain