A painting with five centuries of history
Leonardo da Vinci began the Mona Lisa in Florence around 1503, reportedly at the request of Francesco del Giocondo, a prosperous silk merchant wishing to immortalise his wife Lisa. But Leonardo never delivered the painting. He took it with him to France when King Francis I invited him to court in 1516, and it remained in his possession until his death in 1519. The French Crown then acquired it, and the work passed through the royal collections at Fontainebleau, Versailles, the revolutionary Louvre and Napoleon's apartments — before finding its permanent home at the Louvre in 1797.
For three centuries the painting was prized and appreciated by connoisseurs, but without universal celebrity. It was the theft of 21 August 1911 that changed everything.
The 1911 theft: how a painting becomes a global icon
That morning, a Louvre employee named Vincenzo Peruggia, who had concealed himself in a cupboard overnight, unhooked the painting and walked out of the museum with it rolled under his coat. The Mona Lisa disappeared for two years and two months. The affair triggered unprecedented media hysteria: newspapers around the world ran daily front pages, poets dedicated verses to the absent portrait, and Picasso was even briefly suspected.
Peruggia was finally arrested in December 1913 in Florence, where he had tried to sell the painting to an antique dealer. The Mona Lisa returned to Paris in triumph. This tragicomic interlude made it the most famous painting in the world — not for its beauty alone, but because it suddenly had a story, an absence, a return.
The sfumato technique: Leonardo's great secret
What distinguishes the Mona Lisa from all contemporary portraits is the masterly application of sfumato — a technique Leonardo da Vinci himself invented. The word comes from the Italian sfumare, "to fade like smoke." It involves layering dozens of extremely thin glazes — sometimes just a few microns thick — to create imperceptible transitions between light and shadow, without ever drawing a sharp contour.
In the Mona Lisa, sfumato is particularly visible around the smile and the corners of the eyes. Infrared reflectography studies have revealed that this zone is composed of thirty successive layers of oil paint. It is precisely this technique that makes Lisa's smile so elusive: depending on where you focus your gaze within the painting, the smile appears more or less pronounced — a phenomenon linked to the way the rods and cones of the human retina function.
The identity of the sitter: mystery resolved?
For centuries the model's identity was debated. The dominant theory — Lisa Gherardini, wife of Francesco del Giocondo — was reinforced in 2005 by the discovery of a document in the archives of Heidelberg University: a marginal note from 1503, signed by a Florentine official named Agostino Vespucci, confirming that Leonardo was working at the time on a portrait of Lisa del Giocondo.
Other theories persist nonetheless. Some researchers have proposed that the model may have been a Milanese courtesan, or even a self-portrait of Leonardo in female guise. This last hypothesis, popularised by facial recognition analyses comparing the Mona Lisa to a self-portrait of Vinci, remains marginal in the scholarly community, but it illustrates the enduring fascination the painting continues to exert.
What the painting's details conceal
Recent technical analyses have revealed several secrets invisible to the naked eye. The original Mona Lisa had eyebrows and eyelashes — gradually erased through successive restorations. Architectural columns initially framed the scene, visible in Flemish copies from the sixteenth century. The landscape in the background — sinuous, almost dreamlike — corresponds to no identifiable real place; Leonardo composed an ideal nature rather than reproducing an existing site.
The model's posture — three-quarter turn, hands crossed, gaze directed straight at the viewer — also marks a break with the Florentine portrait tradition, where female subjects were depicted in profile. This frontality creates an immediate, almost unsettling dialogue between the painting and the person looking at it.
The Mona Lisa today: an icon behind glass
Each year, between six and nine million visitors come to the Louvre primarily to contemplate this 77 × 53 cm panel. Since 2019, the museum has been considering the creation of a dedicated room exclusively for the Mona Lisa, to better manage the crowds and offer an experience of contemplation more worthy of a work too often viewed over a forest of smartphones.
It has been protected by climate-controlled anti-reflective glass since 2005, maintaining constant humidity and temperature. Its value? Incalculable and inalienable: French law prohibits the sale of works belonging to the national heritage. Academic estimates put figures between 800 million and several billion euros — but these discussions remain purely theoretical.
The Mona Lisa's influence on art and culture
No painting has been more detoured, parodied or reinterpreted than the Mona Lisa. Marcel Duchamp added a moustache in 1919 (L.H.O.O.Q.) in a Dadaist gesture that itself became a major work. Andy Warhol made a repeated silkscreen of it in the 1960s. Fernando Botero depicted her plump and smiling. Dozens of brands, films, comics and advertising campaigns have pillaged, kitschified or elevated it — proof that it has become, beyond a masterpiece, a pure cultural sign.
This paradoxical ubiquity may be Leonardo's most singular legacy: having painted a picture so perfect that it has become almost invisible from being seen too often — and yet unforgettable for anyone who truly looks at it.