Martin Kemp

The Scholar

Martin Kemp (born 1942) is Emeritus Professor of Art History at the University of Oxford and arguably the most influential living interpreter of Leonardo da Vinci. His career has been defined by a single powerful idea: that Leonardo's art and science are not separate activities but a single integrated investigation of nature.

Kemp's landmark work, Leonardo da Vinci: The Marvellous Works of Nature and Man (1981, revised 2006), broke with the tradition of treating Leonardo's paintings and notebooks as separate fields of study. Instead, Kemp reads the notebooks as evidence of the same visual thinking that produced the paintings — and the paintings as expressions of the same natural philosophy found in the notebooks.

Where Richter compiled, MacCurdy translated, and Pedretti dated, Kemp interpreted. His approach is neither by subject nor by codex nor by chronology alone — it is thematic, drawing connections across Leonardo's entire body of work to reveal the underlying principles that drove him.

The Core Insight

Kemp's fundamental contribution is the concept of Leonardo as a visual thinker — someone for whom drawing was not illustration but cognition. When Leonardo draws a vortex, he is not recording what a vortex looks like; he is thinking about fluid dynamics through the act of drawing. The drawing is the science.

This insight reframes the notebooks entirely. They are not a genius's miscellaneous jottings but a continuous research program conducted through visual investigation. Kemp identifies several organizing principles in Leonardo's thinking:

Organization by Interpretation

Kemp does not present the notebooks as a reference catalogue (like Richter) or a comprehensive translation (like MacCurdy). Instead, he selects and interprets — choosing passages and drawings that illuminate Leonardo's central concerns and weaving them into a narrative argument about what Leonardo was trying to do.

His major works and their organizational strategies:

What Kemp Gets Right

• The unified worldview — Kemp is the first scholar to convincingly demonstrate that Leonardo's art and science are aspects of the same investigation, not competing interests
• Visual thinking — taking Leonardo's drawings seriously as cognitive instruments, not just pretty pictures
• Readability — Kemp writes beautifully, making complex scholarship accessible to interested non-specialists
• Cross-domain connections — showing how water studies connect to hair-painting, how anatomy informs composition, how optics drives sfumato
• Public engagement — major exhibition curation, BBC collaborations, accessible publications. Kemp has brought serious Leonardo scholarship to the widest audience of any living scholar

What It Misses

• Completeness — interpretive selection means many passages are excluded; you can't use Kemp as a comprehensive reference
• The messy reality — Leonardo's notebooks are chaotic, contradictory, and often trivial. A unified-worldview reading can overstate the coherence
• Reference utility — no numbering system, no comprehensive catalogue. You read Kemp to understand Leonardo, but you cite Richter
• The non-visual notebooks — Leonardo's personal records, letters, financial notes, and humorous writings don't fit neatly into the "visual thinking" thesis

Legacy

Kemp's influence extends far beyond academic art history. His vision of Leonardo as a unified thinker — not a painter who dabbled in science, nor a scientist who happened to paint, but a visual philosopher — has become the dominant popular understanding of Leonardo in the 21st century. When museums curate Leonardo exhibitions, when documentaries are made, when Walter Isaacson writes his bestselling biography, the Kemp interpretation is the framework.

For scholarship, Kemp demonstrated that interpretation and synthesis are as valuable as compilation and dating. The field needed Richter to build the reference grid, Pedretti to add chronology, and Kemp to ask: what does it all mean?