Treatise on Painting

Overview

The Treatise on Painting (Trattato della Pittura) is not a notebook written by Leonardo's hand, but rather a compilation made by his devoted pupil and heir Francesco Melzi after Leonardo's death. Melzi gathered passages from Leonardo's notebooks related to the art and science of painting and organized them into a structured treatise of 944 sections.

The most important surviving copy is the Codex Urbinas Latinus 1270, held in the Vatican Library. Though compiled by another hand, it represents Leonardo's most organized body of thought — and reveals how he conceived of painting not merely as a craft but as a supreme science.

Structure

The Treatise is organized into major sections covering:

• The Supremacy of Painting — comparison with other arts (poetry, music, sculpture)
• Precepts of the Painter — practical guidance for the working artist
• Linear Perspective — mathematical foundations of pictorial space
• Light and Shade — the behavior of light on forms
• Color Theory — the nature and interaction of colors
• The Human Figure — proportion, movement, expression
• Landscape and Atmosphere — painting nature
• Drapery — the behavior of fabric

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 sense.

Publication History

The Treatise was first published in abbreviated form in 1651 (Paris, with illustrations by Poussin). The full text of the Codex Urbinas was not published until 1817. Modern scholarly editions continue to refine our understanding of Melzi's compilation and its relationship to Leonardo's surviving manuscripts.