Leonardo da Vinci completes the Mona Lisa painting in Florence

Story: 1510 C.E.  |  Last updated: January 13, 0001

Sometime around 1503 C.E., in a Florence studio, Leonardo da Vinci set a poplar wood panel on his easel and began what would become the Mona Lisa painting — the most recognized portrait in human history. He worked on it for years, returning to its surface again and again, layering gossamer glazes of oil over one another until the face of an unknown woman emerged with a softness no painter had achieved before.

Key details

• Mona Lisa painting: Completed intermittently between roughly 1503 C.E. and 1519 C.E., the oil-on-poplar portrait was still in Leonardo’s studio when he died — suggesting he never considered it fully finished.
• Sfumato technique: Leonardo used fine shading without hard outlines, blending tones so gradually that the sitter’s smile appears to shift depending on where the viewer’s eye falls — a deliberate optical effect rooted in his study of human anatomy and optics.
• Three-quarter pose: The posture Leonardo chose — sitter turned mostly toward the viewer rather than shown in strict profile — broke with standard Italian portrait convention and quickly became the default format for Western portraiture into the 21st century C.E.

What Leonardo actually invented

The Mona Lisa painting is often described as mysterious, which is accurate — but the mystery is precise, not vague. Leonardo solved specific visual problems that had stumped painters before him.

The sitter’s face shows no hard line where skin meets shadow. That was intentional. Leonardo developed the sfumato method — from the Italian word for smoke — to mimic how the human eye actually perceives faces in natural light. The result is a portrait that reads differently at different distances, from different angles, in different moods. Her smile, perhaps the most analyzed expression in art history, appears warmer when viewed peripherally and more ambiguous when looked at directly. This is not accident. It reflects Leonardo’s study of vision, anatomy, and the physics of light, disciplines he pursued in notebooks filled with thousands of observations.

Behind the figure, a landscape recedes in atmospheric haze, the rivers and valleys curving in shapes that echo the folds of her clothing and the waves of her hair. Leonardo believed humanity and nature operated by the same underlying laws. The painting is, in that sense, a visual argument about the cosmos — made from microscopic layers of pigment applied with brushes so fine they left no visible marks.

Who is she?

The sitter’s identity has never been definitively proven. The most widely accepted theory, first proposed by artist biographer Giorgio Vasari in 1550 C.E., is that she is Lisa del Giocondo, wife of a Florentine merchant — which is why the painting is also called La Gioconda in Italian and La Joconde in French. Other proposals have included Leonardo’s mother, Caterina, and even a feminized self-portrait of Leonardo himself, based on structural similarities between the sitter’s face and his own.

Attempts in the 21st century C.E. to locate Lisa del Giocondo’s remains for DNA testing were inconclusive. The mystery persists — and the painting’s open-endedness may be part of why it continues to hold attention across centuries and cultures.

How the painting traveled through history

When Leonardo died in 1519 C.E. at the French court of King Francis I, the portrait passed into royal hands. For generations it hung in French palaces, largely unseen by the public. After the French Revolution transferred the royal collection to the people, the painting entered what would become the Louvre Museum in Paris, where it has remained — with interruptions — ever since.

Those interruptions are part of its story. During World War II, the Mona Lisa painting was evacuated from Paris to a series of rural châteaux to protect it from potential destruction. It returned to the Louvre in 1945 C.E. In 1963 C.E., it traveled to the United States, drawing roughly 40,000 visitors per day at the Metropolitan Museum of Art in New York and the National Gallery of Art in Washington, D.C.

It was stolen in 1911 C.E. — hidden overnight in the Louvre by a former worker named Vincenzo Peruggia, then kept for two years in the false bottom of a trunk in Florence. The theft made international headlines and, paradoxically, cemented the painting’s global fame. People lined up at the Louvre just to see the empty space on the wall.

Lasting impact

The Mona Lisa painting changed what a portrait could be. Before Leonardo, Italian portraits typically showed subjects in strict profile — flat, heraldic, formal. The three-quarter turn he chose placed the viewer in relationship with the subject rather than simply observing her. Every painted portrait that followed, from 17th-century Dutch masters to contemporary photography, inherited that convention.

The sfumato technique influenced generations of painters including Raphael, who visited Leonardo’s studio and incorporated the method almost immediately. The integration of figure and landscape — the idea that a portrait’s background should be emotionally and structurally connected to the subject — became a standard of Western painting.

Beyond technique, the painting helped establish the idea that a work of art could be an object of philosophical and scientific inquiry, not merely decoration or devotion. Leonardo’s notebooks, now studied alongside the painting, reveal a mind that treated painting as a form of research. That fusion of art and investigation shaped how Renaissance humanism understood human potential — and echoes in how we still talk about creativity and curiosity today.

The Louvre now draws roughly nine million visitors per year, and the Mona Lisa remains the primary draw. It hangs behind bulletproof glass, installed after a series of attacks in 1956 C.E. damaged a small area near the subject’s left elbow. The glass has not stopped attempts — vandalism and protest actions have targeted it as recently as 2022 C.E. — but the painting itself has survived intact.

Blindspots and limits

The Mona Lisa’s fame is partly historical accident. The 1911 C.E. theft, the 1963 C.E. American tour, and decades of reproduction on postcards, parodies, and commercial packaging all amplified a painting that might otherwise have been known primarily by specialists. Its celebrity can make it harder, not easier, to see clearly — millions of visitors report feeling underwhelmed when confronted with a painting smaller than they expected, behind glass, across a crowded room.

The overwhelming focus on this single work also flattens Leonardo’s broader achievement. His anatomical drawings, engineering designs, hydrological studies, and other paintings — including The Virgin of the Rocks — represent an equally staggering range of inquiry that the Mona Lisa’s singular fame tends to overshadow. And the sitter herself, whoever she was, remains unnamed in the historical record in any definitive sense — a woman whose face is the most reproduced in human history, but whose identity is still debated five centuries on.

Read more

For more on this story, see: Britannica — Mona Lisa

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