When you hear the name “Leonardo da Vinci,” what comes to mind? For most people, it’s a mysterious, enigmatic smile: the Mona Lisa. For others, it’s the divine drama of The Last Supper. Leonardo is, without question, one of the greatest artists who ever lived. But to label him as just an artist is to miss the point entirely.
Painting was only one of his passions. It was, in many ways, just the byproduct of his true, driving obsession: to understand… well, everything.
Leonardo was the original “Renaissance Man,” the ultimate polymath. He was a scientist, a mathematician, an engineer, an inventor, an anatomist, a geologist, a cartographer, a botanist, a writer, and a musician. His mind was a restless engine of curiosity. He didn’t just want to paint a river; he wanted to know how water flowed, why it swirled, and how he could harness its power. He didn’t just want to draw a person; he wanted to know how every muscle, bone, and sinew worked beneath the skin.
His thousands of pages of notebooks, or codices, are the true window into his genius. Filled with sketches, notes (written backward in his famous “mirror script”), and theories, they reveal a man who was, in many ways, 500 years ahead of his time. Here are the top 10 achievements of Leonardo da Vinci, with a special focus on the incredible inventions that laid the groundwork for our modern world.
1. The Dream of Flight: The Ornithopter and Aerial Screw
Long before the Wright brothers, Leonardo was utterly obsessed with the idea of human flight. He spent countless hours dissecting birds, studying their wing structures, and analyzing how they used air currents to soar. He believed that if man could understand the mechanics of a bird, he could replicate them.
This wasn’t just a fantasy; it was an engineering problem. His notebooks are filled with designs for a “flying machine,” most famously the Ornithopter. This device was essentially a mechanical bird, where the “pilot” would lie face-down, operating a system of rods and pulleys to flap a pair of enormous, bat-like wings.
While this flapping-wing design (which relies on human muscle power) was ultimately impractical, his other flying machine was even more visionary: the Aerial Screw. This was a design for a machine that looks uncannily like a modern helicopter. It featured a large, screw-shaped canopy made of linen. Leonardo theorized that if this “corkscrew” could be rotated fast enough, it would “bore” into the air—which he understood as a fluid with substance—and lift the machine off the ground. He had conceptualized the fundamental principle of vertical lift, four centuries before the first helicopter took to the skies.
2. The Armored Vehicle: A Precursor to the Modern Tank
When Leonardo worked for the powerful Duke of Milan, Ludovico Sforza, he wasn’t just hired as a court painter. He was hired as a military engineer. In a “letter of application” to the Duke, he listed his many capabilities, prioritizing his ability to create devastating war machines and only mentioning his painting skills at the very end.
His most fearsome design was the armored vehicle, a direct ancestor of the modern tank. It was a man-powered, circular vehicle covered in wooden plates reinforced with metal, designed to be “safe and unassailable.” It was shaped like a turtle’s shell to deflect cannon fire. Inside, a crew of eight men would power the machine by turning cranks connected to the wheels, allowing it to move in any direction. It was bristling with 360 degrees of light cannons.
Think of it as a man-powered UFO, designed to roll into a battlefield, scatter the enemy, and protect the soldiers inside. Bizarrely, Leonardo’s design contained a famous flaw: the gears for the cranks were designed to work against each other, making movement impossible. Historians debate whether this was a simple mistake or a deliberate act of sabotage by a man who was secretly a pacifist and called war “pittissima follia” (most bestial madness).
3. Mapping the Human Body: Groundbreaking Anatomical Studies
To paint the human form, Leonardo felt he must understand it. This curiosity drove him to do something that was both taboo and highly illegal at the time: dissect human corpses. Braving the stench of death and the risk of prosecution, he secretly worked in hospitals and morgues, peeling back the layers of the human machine.
His achievement here is twofold. First is the sheer act of performing these dissections—he’s estimated to have dissected over 30 bodies. Second are the drawings he produced. These are not just sketches; they are the world’s first modern anatomical illustrations.
He was the first person in history to accurately draw the human spine with its correct curvature. He produced the first-ever depiction of a fetus in the womb. He studied the heart and correctly deduced that it was a pump—a muscle responsible for moving blood, not the source of emotion. His drawings of muscles, tendons, and bones are so accurate that they could still be used in a medical textbook today. He was, in essence, the co-founder of the modern science of anatomy.
4. The Robotic Knight: The First Humanoid Automaton
Yes, you read that correctly. Around 1495, Leonardo da Vinci designed and (most historians believe) built one of the world’s first humanoid automata, or robots. This was not a weapon, but a marvel of entertainment, likely designed for one of his patrons’ lavish festivals.
This “robotic knight” was a suit of medieval armor that could move on its own. Internally, it was a complex system of pulleys, cables, and gears connected to an external hand-crank. When operated, the knight could sit up, stand, wave its arms, and—most impressively—move its jaw, which was linked to a working visor that could open and close.
This wasn’t a thinking machine, but it was a masterpiece of kinetics. Think of it as the world’s most complex wind-up toy, the direct ancestor of the animatronics at Disney World. It demonstrated Leonardo’s profound understanding of how to mechanically mimic the human body’s functions—a skill he learned directly from his anatomical studies.
5. Conquering the Deep: The Diving Suit
While working in Venice, a city built on water, Leonardo’s mind naturally turned to naval warfare. He pitched an idea to the Venetian government: a way to sneak attack the invading Turkish fleet from underwater. To do this, he designed a complete, self-contained diving suit.
This was not just a snorkel. It was a full-body, waterproof leather suit. The head was covered by a helmet with glass-paned goggles. To breathe, the diver would use two long tubes made of cane reinforced with leather, which would float on the surface thanks to a large cork disk. Leonardo thought of everything: the suit even included a small pouch for the diver to urinate in!
The Venetians apparently found the idea too “dishonorable” and never used it. But the design itself is brilliant. It’s a complete life-support system that shows Leonardo wasn’t just a dreamer; he was a “systems thinker” who considered every practical problem and engineered a solution for it.
6. Engineering the “Ideal City”: Innovations in Urban Planning and Hydraulics
After a devastating outbreak of the plague in Milan, Leonardo became obsessed with a new idea: the “Ideal City.” He saw that the cramped, filthy, disorganized medieval cities were breeding grounds for disease. His solution was a marvel of urban planning.
He designed a city built on multiple levels. The upper levels would be for pedestrians and gentlemen, full of light, air, and beautiful architecture. The lower levels, or “service levels,” would be for commerce, transporting goods, and waste. These lower levels would have canals for barges and a sewage system that would constantly be flushed clean by flowing water.
He was essentially inventing the “smart city” in 1480, with a focus on public health. While his full city was never built, his genius for hydraulics (the movement of water) was put to practical use. He designed and helped build a system of canals for Florence, inventing the miter lock for canals, which is still used today. He saw the city not as a collection of buildings, but as one giant, living machine.
7. The Self-Propelled Cart: The World’s First “Car”
Decades before his robotic knight, Leonardo designed another automated machine: the self-propelled cart. This device is often cited as the ancestor of the modern automobile, but it’s more accurate to call it the first programmable robot.
The cart was a three-wheeled platform with no driver. Its power source wasn’t an engine, but a set of massive, coiled springs—like the mechanism in a clock. But the true genius was in its “programming.” It had a system of cams and gears that could be set in advance to determine where the cart would go. By changing the wooden blocks (cams), you could make the cart turn left, turn right, or go straight at specific points in its journey.
Like the robot, this was probably designed for theatrical pageants, perhaps to move scenery or bring a “deity” onto the stage. It’s an astonishing achievement, combining propulsion, steering, and a rudimentary form of “code” into one machine.
8. The Vitruvian Man: A Blueprint for Human Proportionality
This is one of Leonardo’s most famous drawings, but it’s not “art” in the traditional sense. It’s a scientific study. The Vitruvian Man is his solution to an ancient architectural problem posed by the Roman architect Vitruvius: how can a human body fit perfectly into both a circle (the divine shape) and a square (the earthly shape)?
Leonardo’s drawing, with its two superimposed poses, is a visual thesis statement. It’s his declaration that man is, quite literally, the “measure of all things.” The drawing is a perfect fusion of his anatomical studies (the body is perfectly rendered and proportioned) and his mathematical/engineering mind (the geometry is precise).
More than any other single work, the Vitruvian Man symbolizes the entire Renaissance. It’s the perfect marriage of art and science, a single image that encapsulates the idea that humanity is a miracle of both divine creation and mechanical design. It’s an infographic, a work of art, and a philosophical treatise all in one.
9. His Revolutionary Notebooks: The “Invention” of a New Way to Think
It may seem strange to call a set of notebooks an “invention,” but Leonardo’s codices are perhaps his greatest achievement. His real genius wasn’t just in his individual ideas, but in his process.
Leonardo carried a notebook with him at all times. He sketched everything: the swirling patterns of water in a stream, the way a bird’s wing cuts the air, the facial expressions of people in the street, the rock layers in a cliffside. He would then take these observations, form a theory (a hypothesis), and then design an experiment or a machine to test it.
This—observe, hypothesize, test, record—is the very essence of the scientific method. He was practicing it a century before Francis Bacon or Galileo, who are usually credited with its creation. His thousands of surviving pages are a database of the natural world. His greatest invention, then, was a new way of seeing and thinking about the world—the very engine of modern science.
10. The Ultimate Synthesis: The Mona Lisa and The Last Supper
And so we return to his art. Leonardo’s paintings are his greatest achievements precisely because they are where all his inventions came together. They are the ultimate synthesis of his artistic genius and his scientific mind.
The Last Supper is not just a beautiful painting; it’s a masterwork of engineering and psychology. Leonardo used linear perspective (a mathematical invention) to create the illusion that the painted room was an extension of the real room it was in (the monks’ dining hall). More than that, he invented a new form of storytelling, capturing the precise moment Jesus says “One of you will betray me” and the 12 distinct, human, psychological reactions to that news. (Ironically, his technical invention here failed: he experimented with a new paint medium, fresco-secco, which started flaking almost immediately).
The Mona Lisa is the ultimate product of his anatomical and optical studies. Her famously ambiguous smile and “living” quality are a direct result of a technique he perfected, called sfumato (from the Italian for “smoke”). He applied dozens of incredibly thin, translucent layers of paint to create a “smoky” effect with no hard lines. Because there are no sharp edges, our eyes are constantly shifting, making her expression feel alive and changing. His anatomical studies of facial muscles allowed him to know exactly how a smile begins, and his optical studies taught him how to paint it.
The Mona Lisa is not just a portrait. It is a final thesis, a culmination of a lifetime spent inventing, studying, and understanding. It is a work of science as much as it is a work of art.
Further Reading
- Leonardo da Vinci by Walter Isaacson
- This is perhaps the most accessible and comprehensive modern biography, and it does a fantastic job of connecting Leonardo’s scientific and engineering projects directly to his artistic masterpieces.
- Leonardo’s Notebooks by Leonardo da Vinci (Edited by H. Anna Suh)
- If you want to go straight to the source, this is a beautifully curated collection of his sketches, inventions, and writings from his famous codices.
- Leonardo’s Machines: Da Vinci’s Inventions Revealed by Domenico Laurenza
- This book focuses almost entirely on his inventions, using 3D models and clear explanations to show how his engineering mind worked.
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