Lisa del Giocondo

Mystery solved.

Experts at the Heidelberg University library say dated notes scribbled in the margins of a book by its owner in October 1503 confirm once and for all that Lisa del Giocondo was indeed the model for one of the most famous portraits in the world.

“All doubts about the identity of the Mona Lisa have been eliminated by a discovery by Dr. Armin Schlechter,” a manuscript expert, the library said in a statement on Monday.

Mrs. Giocondo, whose maiden name was Gherardini, was married to a wealthy silk merchant in Florence and was first linked to the painting in 1550, about 50 years after it was finished. But doubts persisted and theories multiplied, including one about Mona Lisa being a man and another that she was Da Vinci’s version of the ideal female, not a real person.

Occam's Razor, indeed.