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ART HISTORY, FROM THE MUSEUMS

A mind on
loose paper.

Leonardo drew to find out how things work.

An old leather-bound notebook lying open on a wooden desk, its yellowed pages covered in brown ink sketches of gears and flowing water
AI-generated image, not a photograph of a real person or place.

He left few finished paintings but a huge body of drawings and notes, written in mirror script from right to left. Museums that hold the notebooks describe a habit any sketcher will recognise: many ideas, side by side, on whatever paper was to hand.

≈ 2,500drawings left behind

Open a notebook

Keep in mind

  • Carry paper everywhere
  • Mix ideas on one page
  • Draw what you see
  • An independent art-history guide

THE SHORT ANSWER

Drawing was
his way of thinking.

The Met calls drawing his tool for recording
his investigation of nature.

THE PAGES

Everything at once

The V&A says no one used paper quite like Leonardo: a single sheet holds an unpredictable pattern of ideas and inventions, like a designer and a scientist at work.

Open a notebook

THE WRITING

Right to left

His notes are in mirror writing, read in reverse. The V&A says it may be because he was left-handed, and that the letters themselves are quite ordinary.

See the numbers

THE HABIT

Watch, then draw

The Met says he drew what he observed: anatomy, animals, plants, moving water and birds in flight, as well as the machines of his day.

Try the habit

INSIDE THE V&A NOTEBOOKS

What is on
the pages?

The V&A in London holds five of Leonardo's notebooks, bound into three volumes known as Codex Forster. Pick one to see what it contains. The bar shows where it falls between the earliest, about 1487, and the latest, 1505.

Notebook picker

Choose a notebook
Forster I.2, Milan, about 1487–90Water and fountains

The earliest of the V&A notebooks, with notes and diagrams on hydraulic engineering and on moving and raising water. The V&A says he was renowned for designing water clocks and fountains for courts.

Forster III, Milan, about 1490–93Hats, horses, heads

The most miscellaneous: geometry and weights beside sketches of a horse's legs, hats and costumes for balls, locks, and an account of the anatomy of the human head.

Forster II.1, Milan, about 1495Proportions

Notes on the theory of proportions, plus a passage on the postures of a group at a table, possibly linked to his work on the Last Supper begun about 1495.

Forster II.2, Milan, 1495–97Weights and motion

Notes on weights, traction, stresses and balances, a look at a crossbow, and a remark ridiculing those who thought perpetual motion was possible.

Forster I.1, Florence, 1505Changing shapes

Titled and dated July 1505 in his own hand. It considers how changes in a solid's shape relate to its volume, a branch of mathematics known today as topology.

Source: Victoria and Albert Museum, Leonardo da Vinci's notebooks (updated 11 December 2025) and its Codex Forster II and III articles.

Descriptions from the Victoria and Albert Museum's articles on Leonardo da Vinci's notebooks. Art history only.

TWO NUMBERS WORTH KNOWING

Few paintings,
many pages.

One figure from the Met in New York,
one from the V&A in London.

≈ 2,500

Drawings Leonardo left

The Metropolitan Museum of Art says completed works by Leonardo are few, but he left a large body of drawings, almost 2,500, most still gathered into notebooks.

DRAWINGS · THE MET

5 in 3 volumes

Notebooks held in London's V&A

Five notebooks, bound into three small volumes called Codex Forster, have been in the V&A's collection since John Forster bequeathed them in 1876. They date from about 1487 to 1505.

NOTEBOOKS · V&A

The V&A thinks Leonardo probably worked on loose sheets bought from Milan's stationers, later folded into booklets and bound, possibly under the ownership of the sculptor Pompeo Leoni (1533–1608).

FOUR HABITS FROM THE NOTEBOOKS

Sketch like
a notebook keeper.

These are not rules Leonardo wrote down; they are habits the museums describe in his pages. Each one works with a pencil and any paper.

A sketcher's hand drawing a horse's leg in brown ink on cream paper, with a quill pen and a small ink pot beside it
AI-generated image, not a photograph of a real person or place.

Step 1

Keep paper with you

The V&A says he probably carried loose sheets about with him to record what he noticed. A pocket sketchbook does the same job.

Step 2

Let ideas share a page

His sheets mix machines, faces and diagrams. Do not save a fresh page for each idea; put them side by side and see what connects.

Step 3

Draw from life

The Met lists anatomy, animals, plants, water in motion and birds in flight. Pick one moving thing and sketch it several times.

Step 4

Plan before you paint

The National Gallery says he worked out a composition in a drawing before beginning a painting, as with the Burlington House Cartoon.

WHY MIRROR WRITING?

A secret code,
or just easier?

A small hand mirror propped beside a page of handwriting so the reversed script can be read in the reflection
AI-generated image, not a photograph of a real person or place.

The V&A says the mirror writing has caused much speculation. Was he trying to make sure only he could read his notes, or did writing from right to left simply come easier because he was left-handed?

It adds that writing masters of the time demonstrated mirror writing, that his letter shapes were the ordinary script his father, a legal notary, would have used, and that the notes can be read once the eye gets used to the style. He also often started a notebook from what we would call the last page.

Questions

Questions on the way

Why did Leonardo write backwards?

No one knows for certain. The V&A says one idea is secrecy and another is that, being left-handed, he found right-to-left writing easier. It notes writing masters of the time also demonstrated mirror writing.

How many drawings did Leonardo leave?

The Metropolitan Museum of Art says he left a large body of drawings, almost 2,500, most still gathered into notebooks.

Can I see his notebooks in the UK?

The V&A holds five notebooks bound into three volumes, the Codex Forster, in the National Art Library. It says one is on display in its Medieval and Renaissance galleries, and all three can be explored online.

What did he write about?

The V&A notebooks cover water engineering, weights and balances, proportions, geometry, anatomy, costumes, locks and perpetual motion, which he studied and eventually rejected.

Where was he trained?

The Met and the National Gallery say he trained in Florence in the workshop of the sculptor and painter Andrea del Verrocchio.

Destination

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