Compositional Sketches for the Virgin Adoring the Christ Child, with and without the Infant St. John the Baptist; Diagram of a Perspectival Projection (recto); Slight Doodles (verso)

Leonardo da Vinci · 1480–85 · Silverpoint, partly reworked by the artist with pen and dark brown ink on pink prepared paper; lines ruled with metalpoint (recto); pen and brown ink (verso)

From the collection of The Metropolitan Museum of Art. Free to download, adapt and use — no permission needed.