Treatise on Painting
Trattato della Pittura — Compiled by Francesco Melzi · Vatican MS Urb.lat.1270
I am fully conscious that, not being a literary man, certain presumptuous persons will think that they may reasonably blame me; alleging that I am not a man of letters. Foolish folks! do they not know that I might retort as Marius did to the Roman Patricians by saying: "That they, who adorn themselves with the labours of others will not allow me my own."
— Leonardo da Vinci, Introduction to the Treatise on Painting
Overview
The Treatise on Painting (Trattato della Pittura) is not a notebook written by Leonardo's hand, but rather a monumental synthesis compiled by his devoted pupil and heir Francesco Melzi after Leonardo's death. Melzi spent decades extracting passages from Leonardo's original manuscripts and organizing them into a structured treatise of 944 sections.
The canonical primary witness is the Codex Urbinas Latinus 1270, preserved in the Vatican Library. Though copied in Melzi's clean humanist hand, it represents Leonardo's most organized body of thought — revealing how he conceived of painting not merely as a manual craft but as a supreme mathematical science.
Structure of the Eight Parts
- Part I: The Paragone — The supreme comparison of painting with poetry, music, and sculpture
- Part II: Precepts of the Painter — Creative solitude, mirror-like observation, and studying from life
- Part III: Perspective — Linear geometry, perspective of color, and aerial atmospheric recession
- Part IV: Light and Shade — Chiaroscuro, candle illumination, and the imperceptible transitions of sfumato
- Part V: The Human Figure — Anatomy, proportion, and the expression of internal emotions (i moti mentali)
- Part VI: Drapery — Aerodynamic folds and fabric revealing living anatomical posture
- Part VII: Landscape and Atmosphere — Aerial perspective, mountains, mist, and the scattering of blue light
- Part VIII: Color Theory — Reflected light, ambient illumination, and the chromatic nature of shadows
Leonardo's Defense of Painting
One of the most remarkable aspects of the Treatise is Leonardo's passionate defense of painting as a science superior to poetry, music, and sculpture. He argued that painting alone could represent the full truth of nature because it addressed the sense of sight — which he considered the noblest window of the soul.