Ginevra de' Benci, a well-known young Florentine woman, is universally considered to be the portrait's sitter. Leonardo painted the portrait in Florence between 1474 and 1478, possibly to commemorate Ginevra's marriage to Luigi di Bernardo Niccolini at the age of 16. More likely, it commemorates the engagement. Commonly, contemporary portraits of females were commissioned for either of two occasions: betrothal or marriage. Wedding portraits traditionally were created in pairs, with the woman on the right, facing left; since this portrait faces right, it more likely represents betrothal.

Simplicity is the ultimate sophistication.- Leonardo da Vinci

Leonardo da Vinci https://en.wikipedia.org/wiki/Leonardo_da_Vinci

Ginevra de' Benci https://en.wikipedia.org/wiki/Ginevra_de%27_Benci