For Leonardo da Vinci, the diagram was more than a sketch—it was a "scaffold for the artist's imagination." This post explores how the Renaissance master used disegno (drawing) and misura (measure) to transform the static rules of geometry into dynamic observations of the natural world, from the flight of birds to the Vitruvian Man.

This 2013 conversation with artist and Professor of contemporary drawing Richard Talbot, explores the intersections of linear perspective, diagrammatic drawing, and scientific thought. The dialogue traverses the history of the "Unmoved Onlooker," the structural potential of the blank page, and the tension between mathematical systems and intuitive creation in contemporary art.