In Milan, in the late 1480s, the most famous painter in Italy sat down with a Latin grammar book and did something that looks astonishingly modern: he copied lists of unfamiliar words into a notebook — the Latin word, then its meaning, grouped by topic, written out again and again until they stuck. Scholars who have studied the manuscript, now called the Codex Trivulzianus, describe it as documenting "long lists of learned words copied from authoritative lexical and grammatical sources." In other words: the greatest mind of the Renaissance was making flashcards. Five hundred years before spaced-repetition software existed, Leonardo da Vinci was doing the same thing you do with your deck every morning.
That fact matters more than it seems. Leonardo called himself "omo sanza lettere" — "a man without letters." He was, by the standards of his time, uneducated: denied the classical schooling that every scholar of the Renaissance took for granted. Yet he went on to become the archetypal self-taught learner — a man who taught himself Latin as an adult, read the greatest books of antiquity in their original language, filled 13,000 pages of notebooks with his own observations, and turned a childhood disadvantage into the engine of the most creative mind in history. His story is one of the best arguments ever recorded for the power of self-directed language learning.
A Birth That Closed the School Doors
Leonardo was born on 15 April 1452 in or near Vinci, a hill town in Tuscany, about 35 kilometers from Florence. His father, Ser Piero da Vinci, was a successful legal notary — a respected gentleman. His mother, Caterina, was a young peasant woman. The two were not married. Leonardo was born out of wedlock, and in fifteenth-century Italy, that single fact quietly shut most of the doors of formal education.
The Renaissance was built on Latin. Every university, every law court, every work of science, medicine, and philosophy operated in Latin. Boys learned it in the scuole d'abaco and Latin grammar schools that prepared them for the university — but those schools were for legitimate sons of respectable families. An illegitimate child, however brilliant, could not simply enroll. As one biographer put it, Leonardo received "only a basic and informal education in vernacular writing, reading, and mathematics." That is the polite way of saying: he learned to read and write his native Italian, and to do sums — and nothing more. The entire classical inheritance of his civilization was locked behind a language he had never been taught.
His family seems to have noticed early where his talents lay, and pointed him not toward books but toward the workshop. It was the most consequential career decision in the history of art.
The Workshop University
Around the age of fourteen, Leonardo became a garzone — a studio boy — in the workshop of Andrea del Verrocchio, the leading painter and sculptor in Florence. He became a full apprentice around seventeen and remained in training for seven years, qualifying as a master in the Guild of Saint Luke at twenty in 1472. But the workshop gave him something far more valuable than a trade: it gave him a university.
Verrocchio's bottega was not merely a painting studio. It was a full-scale production house of the Renaissance — drafting, painting, sculpture, casting, chemistry, metallurgy, mechanics, and engineering. Leonardo learned how pigments were made and how bronze was poured. He learned the geometry of perspective, then being formalized by the painter-mathematician Piero della Francesca. Florence was the intellectual capital of Europe, and Leonardo moved through its circles — the humanist scholars around the Medici, the Platonic Academy, the workshops of Ghirlandaio, Botticelli, and Perugino, all of whom trained alongside him. He was learning constantly, intensely, and without a single university lecture.
And yet the gap remained. Every educated person around him could read the ancient authors. He could not. Every treatise on anatomy, optics, and natural philosophy was written in Latin. He could not. It was the one wall he could not paint his way through.
"Omo Sanza Lettere": The Man Without Letters
Leonardo addressed the wound directly in his own writings. In a famous passage defending his lack of formal education, he wrote:
"I am fully aware that the fact of my not being a man of letters may cause certain presumptuous persons to think that they may with reason censure me, alleging that I am a man ignorant of book-learning."
He then turned the charge around: the things he studied, he wrote, "require experience rather than the words of others." Experience — observation of the world with his own eyes — was to be his teacher. He called his method saper vedere: knowing how to see. Where the scholars of his day took their knowledge from Latin books, Leonardo would take his from nature itself, and he would write it down in his own language, in his own hand, in his own way.
But here is the part that should interest every language learner: Leonardo did not stop at rejecting book-learning. He understood that Latin was the master key to the knowledge he wanted — the anatomy of the human body, the physics of water and light, the natural history of the ancients — and he understood that he could simply learn it himself. He was already a grown man, one of the most sought-after artists in Italy. He did it anyway.
The Latin Project: Word Lists in a Milan Notebook
Leonardo moved to Milan in 1482, at thirty, to work for Duke Ludovico Sforza. It was in Milan, during his late thirties and forties, that he mounted his serious assault on Latin. The evidence survives in his own hand.
The Codex Trivulzianus, assembled around 1487–1490, is a notebook containing pages of Latin vocabulary lists — words copied from authoritative grammar and lexicon sources, with their meanings, written out repeatedly. It is, in effect, a handmade vocabulary deck: a learner drilling himself on the words of a foreign language, exactly as a modern student drills with flashcards. There are also drafts of letters and notes on architecture, showing a man using his growing Latin to engage with the technical literature of his age.
The timing is the lesson. Leonardo began this serious, systematic language study when he was past thirty-five and approaching forty — an age at which most modern learners believe the brain has closed for business. He was already at the top of his profession, with no examination to pass and no degree to earn. He learned Latin because he wanted the knowledge it guarded, and he built his vocabulary the slow, unglamorous way: list after list, word after word, repetition after repetition. He was, in the truest sense, a spaced-repetition user — centuries before the algorithm existed.
A Library Built From Word Lists
And it worked. The proof is in what Leonardo began to read. His notebooks record the books he owned and borrowed, and they show a man devouring the classical canon in Latin: Pliny the Elder's Natural History, the great encyclopedia of the ancient world, which Leonardo mined for his studies of plants, animals, and geology; the poetry of Ovid; the fables of Aesop; and the architecture and engineering of Vitruvius, whose treatise on building shaped Leonardo's anatomical studies of proportion — including the famous Vitruvian Man, his drawing of the human figure inscribed in a circle and a square. That drawing, among the most famous images in the world, is the direct product of a self-taught adult reading a Latin technical text.
Latin also unlocked the medical and scientific literature he craved. His anatomical studies — more than 240 meticulous drawings of muscles, bones, and organs, based on his own dissections of more than thirty corpses — were informed by the works of the ancient physicians Galen and others, which existed only in Latin (and Greek). His investigations of optics, hydraulics, and mechanics all drew on texts he had once been unable to open. The word lists in the Codex Trivulzianus were the foundation of all of it.
13,000 Pages in His Own Language
There is a second, quieter act of linguistic defiance in Leonardo's project. He did all of this in Italian.
His notebooks — more than 13,000 pages of observations, diagrams, inventions, grocery lists, and ideas, kept daily across his entire adult life — are written in his native vernacular, the language of the people, not the Latin of the scholars. He even wrote them in mirror writing, from right to left, a habit of his left-handedness that also served to keep his notes private. Contemporary scholars, who had built their entire identity on Latin, largely dismissed him because of it. The Wikipedia article on Leonardo puts the tragedy plainly: "contemporary scholars mostly ignored Leonardo the scientist, although he did teach himself Latin."
Think about what that means. He learned the language anyway. He read the books anyway. He made his discoveries anyway — in his own tongue, on his own terms, with his own system of notebooks. The establishment refused to admit him, and it did not matter, because his education was self-issued. The man who was once barred from school ended his life in France, in the service of a king, carrying a library of notebooks that would make him the most studied human being in history.
The Payoff in Paint
The knowledge he unlocked did not stay in his notebooks. It went into the paintings. The Mona Lisa's famous sfumato — the smoky blending of light and shadow that makes her face seem alive — grew out of Leonardo's studies of optics and the physics of light. The Last Supper's breathtaking one-point perspective grew out of his mastery of geometry and his reading of the classical treatises on proportion. His anatomical understanding of muscle and bone gives every figure he drew a weight and motion no earlier artist had achieved. His scientific reading of Pliny informed the fantastic landscapes and creatures in his paintings of the Virgin and Child.
The languages he taught himself did not make him a scholar. They made him a better observer, a better thinker, and — in the end — a better painter. That is what learning a language does: it does not just add a skill, it multiplies everything else you already do.
What Leonardo Teaches Language Learners
Leonardo's story is not merely inspiring; it is a practical curriculum in how to learn. Five lessons stand out.
1. You are never too old. Leonardo began serious Latin study past thirty-five and achieved real fluency with it — reading Pliny, Vitruvius, and the technical literature of antiquity. The modern myth that adults cannot learn languages is exactly that: a myth. The greatest autodidact in history disproved it five hundred years before the science did.
2. You do not need a teacher, a school, or a degree. Leonardo had none of the three, and he out-read the scholars who dismissed him. His teachers were a grammar book, a lexicon, and his own relentless curiosity. Self-study is not a consolation prize; for a motivated learner it can be the best education available.
3. Vocabulary lists work. The Codex Trivulzianus is a 15th-century flashcard deck: words copied, grouped, and repeated until internalized. The modern science of spaced repetition has only confirmed what Leonardo intuited — vocabulary is built word by word, review by review, and the system matters more than the talent.
4. Learn the language of what you love. Leonardo did not learn Latin for Latin's sake; he learned it to read the books that fed his obsessions — anatomy, nature, engineering. Choose target-language content that genuinely interests you, and the vocabulary will take care of itself.
5. Make curiosity your curriculum. Leonardo's education had no syllabus. It was organized entirely around questions: How does water flow? How do muscles move? How does light fall? His 13,000 pages of notes are the physical record of a mind that treated learning as a lifelong habit rather than a phase of life. As a line attributed to him puts it: "Learning never exhausts the mind."
The Legacy of the Man Without Letters
Leonardo died on 2 May 1519, at the manor of Clos Lucé in France, in the service of King Francis I, who reportedly held his head as he passed. He was sixty-seven. His contemporary biographer, Giorgio Vasari, wrote that Leonardo possessed qualities that "transcended nature" and was "marvellously endowed with beauty, grace and talent in abundance" — a man whose "magnificent presence brought comfort to the most troubled soul."
But the greatest monument Leonardo left was not a painting. It was his notebooks: 13,000 pages of questions and answers, in a language the scholars said had no value, written by a man the schools had rejected. Every page is evidence of the same quiet act — a boy who could not go to school deciding, at forty, to teach himself the language of the learned, word by word, list by list, until the whole world of knowledge opened to him.
If you have ever told yourself that you started too late, that you have no teacher, that flashcards are for children, or that one person's self-education cannot amount to much — remember the man without letters who copied Latin word lists into a Milan notebook, and who ended his life as the most learned observer of nature in the Western world. He started where you are starting: with a list of words, and the decision to learn them.