What is the focal point element of the Mona Lisa?

Answer 1

hatching, cross hatching and smudging

If you are referring to Leonardo da vinci's masterpiece, also known as La Gioconda, it is an oil painting, so the answer above is not applicable. The keyword frequently associated with this painting is the 'chiaroscuro' technique.

Many people confuse techniques with elements in art. Classically there are five elements of art: line, mass, shape, color, and form. Leonardo also introduced the newly discovered technique of perspective in this portrait.

Answer 2

No particular symbols. The glass in front of the painting is new, so don't believe the stories that Leonardo wrote secret symbols on the glass!