Leonardo's Drawing Class

Among the recently digitized manuscripts from the Biblioteca Ambrosiana in Milan, scholars have uncovered what appears to be an extraordinary document—a treatise on drawing by Leonardo da Vinci addressed to "pupils of distant ages." While the authenticity of this particular manuscript remains curiously difficult to verify (the watermarks appear to be from several different centuries simultaneously, and the ink exhibits properties unknown to Renaissance chemistry), the voice is unmistakably Leonardo's.

Most puzzling of all, marginal notes in the master's hand make reference to "quando la carta sarà gratis come l'aria" (when paper shall be free as air) and "le macchine che pensano" (the thinking machines)—prophecies that suggest either remarkable foresight or, as one scholar delicately proposed, "a temporal anomaly in the archive."

Dr. Claudio Antropicus of the Institute for Renaissance Digital Studies was the first to notice peculiar anachronisms in the text. "The linguistic patterns are perfectly consistent with Leonardo's other writings," Dr. Antropicus notes, "yet certain passages seem to anticipate technologies and social conditions that would not exist for centuries. It's as if the manuscript exists in a quantum superposition between authentic and impossible."

The English translation of the manuscript begins thus:

My dear pupils of this distant age,

Attend well, for I shall speak to you of that most wondrous art which is drawing—the foundation of all visual understanding, the very grammar of sight itself. In my time, we have witnessed a miracle most profound: the transformation of paper from precious rarity to faithful companion. Where once our masters hoarded each scrap of parchment as a miser guards his gold, we now possess sheets enough to capture every fleeting shadow, every turn of muscle beneath the skin.

Consider this marvel—in my youth, a craftsman might labor four days entire to earn sufficient coin for twenty-five sheets of writing material. Now, in these blessed times, I may acquire the same quantity for but half a day's wage. This liberation of material has unleashed a torrent of discovery! No longer must we commit every line to memory before touching stylus to surface. We may err, we may experiment, we may chase the very thoughts as they flow from mind to hand.

You who read these words in your age of plenty cannot fathom the revolution this simple change has wrought. When paper became as common as bread—though far more lasting in its nourishment—we artists became as explorers in uncharted lands. Each sheet beckons us to map the territory of the visible world. I fill thousands upon thousands with studies: the wing of a dragonfly, the spiral of water in a vortex, the machinery of the human heart laid bare.

Just yesterday, I completed a drawing of a child in its mother's womb—such delicate work with red chalk upon paper prepared with bone dust and terre verte. The advantage of this tinted ground cannot be overstated! Upon it, I may work both toward light with white lead and toward shadow with chalk, achieving in moments what would require hours on white paper. This child, curled like a seed within its vessel, required perhaps thirty sheets before I captured the truth of its form. In my master's time, such expenditure would have been deemed madness!

But I digress into enthusiasm, as is my nature. Let me speak plainly of the methods by which one may learn this noble art.

First, understand that drawing is not a gift bestowed by the heavens upon a chosen few—it is a skill, like the forging of iron or the planing of wood. The hand must be trained through repetition, the eye through careful observation. Begin each day with simple exercises: straight lines drawn without aid of ruler, circles that kiss their own beginnings, spirals that tighten and release like the springs in my flying machine designs. These marks may seem humble, but they are the alphabet from which all images are composed.

When I was apprentice to Verrocchio, he would have us draw eggs for days uncounted. "Leonardo," he would say, "when you can render this simple ovoid from every angle, capturing how light caresses its surface, then you may attempt a human head." How I chafed at such restriction! Yet now I see the wisdom—for is not the head but an egg adorned with features? Is not the torso an egg elongated? Break all complex forms into these simple geometries, and the world becomes manageable.

I have recently completed studies of water flowing over obstacles—twenty-three sheets showing how liquid behaves when meeting resistance. For this work, I employed black chalk from the quarries near Troyes, most excellent for capturing the foam and turbulence. But here is the secret: I spent three parts of my time observing and one part drawing. The eye must feast before the hand may dance. Watch how water rebels against the stone, how it creates vortices and eddies, how each droplet seeks its own path yet contributes to the greater flow. Only when these patterns live in your mind should you dare to trap them on paper.

The materials themselves deserve reverence and understanding. For capturing the bloom of youth upon a maiden's cheek, nothing surpasses red chalk—sanguine, we call it, the color of blood and life. For the weathered face of a warrior, I reach for black chalk, which can be sharp as a dagger's point or soft as shadow. And for the sparkle in an eye or the gleam upon silk, white lead applied with discretion transforms the drawing from study to living thing.

My latest triumph—forgive an old man his pride—is a portrait of Madonna Lisa, wife of the merchant Giocondo. Though I speak here of the preparatory drawings, not the painting itself. I have filled near to one hundred sheets with studies of her hands alone! Each finger required its own contemplation, for hands speak a language as eloquent as faces. In one drawing, executed with silverpoint upon paper I prepared with powdered bone and pale blue pigment, I captured the way her smallest finger curves away from its fellows, like a thought held in reserve.

But technique alone does not make an artist. One must cultivate a special quality of attention—what I call sfumato of the mind, where the boundaries between observation and understanding dissolve like smoke. When I draw the wing of a bat stretched against the light, I am not merely recording its appearance. I am understanding flight itself, the way membrane and bone conspire against the weight of flesh. Each drawing is both a capturing and a questioning.

I urge you to work upon tinted papers whenever possible. Mix bone dust with terre verte or raw umber to create a middle tone, then paint this ground upon common paper. The Venetians sell papers already tinted in blue and gray, most convenient for those who lack the patience for preparation. Upon such grounds, you need not labor to establish middle values—they exist already, waiting to be pushed toward light or shadow. Time saved is time gained for deeper observation.

The act of drawing serves purposes beyond the creation of images. It is meditation, though of an active sort. When I spend hours rendering the spiral of a snail's shell, my mind enters a state of such focus that all worldly concerns dissolve. The debts I owe, the patrons who plague me, the unfinished commissions that haunt my workshop—all vanish like morning mist. There remains only the conversation between eye, hand, and subject. In this state, revelations come unbidden. The spiral of the shell speaks to the spiral of water, which speaks to the spiral of wind, which speaks to the arrangement of seeds in the sunflower's face. All nature is connected by invisible threads, and drawing reveals these connections.

I must confess a preference that my contemporaries find peculiar: I often draw to the accompaniment of music. A lute player in my workshop provides gentle melodies while I work. The rhythm of the music guides the rhythm of my hand, particularly when drawing flowing forms—drapery, water, hair in motion. Yet for precise anatomical work, silence serves better, allowing full concentration upon the architecture of bone and sinew.

Some ask whether 'tis better to draw from life or from the imagination. This question misses the mark entire! One must do both, in constant alternation. Draw from life to fill your mind's storehouse with truth. Draw from imagination to discover new combinations of that truth. I have dissected perhaps thirty corpses to understand the human form, yet when I draw my visions of flying machines, I populate them with figures that never were, posed in attitudes never seen. Knowledge and fantasy must dance together.

For those beginning this journey, I offer this counsel: embrace your early clumsiness as a father embraces an infant learning to walk. Your first thousand drawings will disappoint you. Good! Disappointment is the seed of improvement. Save these early efforts—not from vanity, but as maps of your progress. When frustration threatens to still your hand, compare your work of today with that of a year past. The distance traveled will restore your courage.

Procure the simplest materials at first. A piece of charcoal from the hearth, sharpened to a point. Common paper, even that already marked upon one side. Later, as skill grows, invest in finer tools. But remember always that the greatest drawings I have seen were made with the humblest materials by those who had trained their eyes to truly see.

I leave you with this thought: drawing is not about making pictures. It is about understanding the world so deeply that you can recreate it from nothing but marks upon a surface. It is about becoming so intimate with the visible that you can make it live again through your hand. In an age where paper flows like water from the mills, you have no excuse for empty hours. Draw constantly. Draw everything. Draw as if the secret of creation itself might be revealed in the next stroke.

The eye, which is called the window of the soul, is the principal means by which understanding may most fully appreciate the infinite works of nature. And the hand, trained through constant practice, is the faithful servant that gives form to what the eye perceives. Together, they make the artist.

Thus speaks Leonardo, servant of sight, student of nature eternal.

Written in Milan, in the year of our Lord 1497, upon paper of excellent quality purchased for merely four soldi the quire—O fortunate age!

Re-published from July 2025