Portrait · archives · hypotheses
Who is
the Mona Lisa?
Is Lisa Gherardini really Mona Lisa? An investigation into Florentine documents, 16th-century testimonies and theories that transformed a portrait into a global enigma.

Short answer
The Mona Lisa most likely represents Lisa Gherardini
Born in Florence in 1479, Lisa Gherardini married the silk merchant Francesco del Giocondo in 1495. Two independent and consistent sources connect Leonardo to his portrait: a note by Agostino Vespucci written in October 1503 and the account published by Giorgio Vasari in 1550. Identification is not a mathematical certainty, but today it is practically a consensus among specialists.
Lisa Gherardini
Name, date, Florentine environment and presumed order converge with the archives.
Why did Leonardo keep the painting?
The portrait was reworked at length and never seems to have been delivered to Francesco del Giocondo.
I · Names
Mona Lisa, Monna Lisa or The Mona Lisa?
Madonna
Italian contraction meaning "Madame". "Monna Lisa" therefore means "Madame Lisa".
The first name
Lisa Gherardini belongs to a Florentine family of landowners.
The marital name
Feminized form of Giocondo, the name of her husband Francesco.
The French form
Francisation of Gioconda; the word also evokes joy and happy character.
II · The woman behind the portrait
Who was Lisa Gherardini?

A Florentine, not a princess
Lisa was born on June 15, 1479 into an old family, the Gherardini, whose fortune was more land-based than commercial. At fifteen, she married Francesco del Giocondo, a silk merchant and well-established citizen of Florence.
Marriage places him in a prosperous bourgeoisie. The couple has several children; the Louvre has six. Lisa leads a socially respectable but poorly documented existence, far from the posthumous fame of her face.
The order for the portrait is often linked to the birth of a child and the purchase of a new house. This explanation is plausible and taken up by the Louvre, but the precise details of the order are not all preserved.
III · The evidence
Why is identification strong?
Agostino Vespucci
A marginal note indicates that Leonardo is working on a head by Lisa del Giocondo. It is contemporary with the beginning of the portrait.
Giorgio Vasari
He writes that Francesco del Giocondo entrusted Leonardo with the portrait of his wife Mona Lisa.
Tradition of the name
Monna Lisa and Gioconda move around early and remain attached to the work.
Rediscovery
Heidelberg's note, spotted in an edition of Cicero, spectacularly reinforces Vasari's testimony.
Heidelberg's note
Agostino Vespucci, collaborator of the Florentine chancellery and close to Machiavelli's circle, compares Leonardo to the ancient painter Apelles. In the margin of a book printed in 1477, he mentioned the head of Lisa del Giocondo in October 1503.
This notation does not assert that the current painting was already completed. It establishes that on the right date, Leonardo was indeed working on the portrait of a Lisa del Giocondo.

IV · The travel table
Why did Lisa never receive his portrait?
| Period | Probable step | What we know |
|---|---|---|
| Around 1503 | Start in Florence | Vespucci documents work on Lisa del Giocondo. |
| Following years | Successive repetitions | Leonardo modified and refined the painting at length. |
| 1516 | Departure for France | He took major paintings to Francis I. |
| 1518 -1519 | Royal collection | The painting was most likely acquired by Francis I and remains in France. |
V · The copy of the Prado
Witness painted next to original

Same model, same process
Infrared reflectography reveals corrections in the Prado copy similar to those in the Louvre painting. The copyist therefore worked as close as possible to Leonardo and followed several stages of his development.
This copy alone does not prove Lisa's identity, but it shows that the composition was a workshop project followed over time, not an image invented late around an isolated painting.
Its state of conservation and its more readable landscape also help to imagine certain contrasts now attenuated in the original.
VI · Alternative theories
Who else was proposed?
Isabella d'Este
Marquise of Mantua, drawn by Leonardo and eager to obtain a painted portrait. But the type of drawing, its status and the sources do not match as well as Lisa del Giocondo.
Isabella Gualanda
Proposed from the late testimony of Antonio de Beatis concerning a Florentine lady linked to Julien de Medici. Biographical links remain fragile.
Pacifica Brandani
Mother of Hippolyte de Medici and mistress of Julien. The idea of a memorial portrait painted after his death does not have direct proof.
Salaigh
Leonardo's student was brought closer to the face based on idealized similarities and plays on the letters of "Mona Lisa". This reasoning is not documentary.
Self-portrait
Numerical overlays between the Mona Lisa and an alleged portrait of Leonardo popularized the idea. They depend on arbitrarily chosen framing and landmarks.
Ideal figure
The painting certainly goes beyond the simple recording of a face. But idealizing Lisa doesn't mean the historical model didn't exist.
VII · Portrait and invention
Real Lisa, transformed Mona Lisa

Ginevra de' Benci
Another female portrait of Leonardo, documented and individualized. The comparison shows how the artist unites social resemblance, landscape and psychological presence.

A face made alive
Leonardo dissolves boundaries, organizes transitions and maintains expression in a mobile state. The "mystery" comes first of all from a pictorial technique.

A recomposed world
The Mona Lisa landscape is not necessarily an identifiable unique location. It amplifies the portrait by connecting it to the forces of nature.

A reworked work
Like Saint Anne, the Mona Lisa accompanied Leonardo for years. Its primary identity remains, but the work becomes a personal laboratory.
VIII · What is certain
Facts, probabilities and legends
| Affirmation | Level | Why |
|---|---|---|
| The model is Lisa Gherardini | Very likely | Vespucci, Vasari concordance, chronology and tradition of the title. |
| Francesco ordered the portrait | Likely | Vasari says so and the family context is appropriate. |
| The commission celebrated a birth and a house | Plausible | Coherent biographical context, indirect documentation. |
| Leonard loved Lisa | Not demonstrated | No source documents a romantic relationship. |
| The Mona Lisa is a man in disguise | Unfounded | Theory based on subjective similarities. |
| Landscape reveals identity | Speculative | The proposed locations do not produce any biographical evidence. |
FAQs
Questions about Mona Lisa
What was the Mona Lisa's real name?
Lisa Gherardini, who became Lisa del Giocondo after her marriage to Francesco.
Why is it called Mona Lisa?
"Monna" is a contraction of Madonna, "Madame": Monna Lisa means Madame Lisa.
How old was she at the beginning of the portrait?
Born in 1479 and painted from around 1503, Lisa was around twenty-four years old.
Why did Leonardo keep the painting?
We don't know for sure. It seems to have continued its development for years and never delivered it.
Is identity definitively proven?
The evidence is not absolute, but the totality of the sources makes Lisa Gherardini by far the strongest identification.
Institutional sources
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