Leonardo da vinci, Double manuscript page on the Sforza monument. The left page is devoted to mechanical studies — five carefully rendered technical drawings arranged vertically, each showing wooden joining or clamping mechanisms in three-quarter perspective. They appear to depict interlocking beams, bolt fastenings, and timber joints of increasing complexity, with short annotating notes flanking each drawing on both sides. The right page is dominated by a large, commanding drawing of what appears to be the lower torso and hindquarters of a horse rendered as a structural armature — a grid of horizontal and vertical ribs forming a curved, basket-like framework that captures the swelling volume of the animal's form. The gridded surface suggests a mold or internal scaffolding for casting, with the waist cinching inward before flaring out again at the haunches. Dense blocks of mirror-script text surround the drawing on the left and bottom, and a folio number — 157 — is visible in the upper right corner. A faint institutional stamp appears near the bottom center. https://en.wikipedia.org/wiki/Codex_Madrid_(Leonardo)#/media/File:Leonardo_da_vinci,_Double_manuscript_page_on_the_Sforza_monument.jpg