Two figures on the covers of Guns N’ Roses’ Use Your Illusion albums were lifted line for line from a 500-year-old Vatican fresco. This episode decodes that fresco, Raphael’s School of Athens, painted between 1509 and 1511 in the Stanza della Segnatura, Pope Julius II’s private library, where a wall of pagan philosophy sits directly opposite a wall of Christian theology under the motto Causarum Cognitio, seek knowledge of causes.

We break down the central pairing of Plato pointing to the heavens with his Timaeus and Aristotle gesturing to earth with his Nicomachean Ethics, the deliberate tension in which book each holds, the Renaissance celebrities cast as ancient thinkers, the inclusion of Averroes, the mysterious white-robed figure staring straight at the viewer, the perspective geometry and Bramante-inspired architecture, hidden triangles in the floor tiles, and the surviving full-scale cartoon in Milan that is missing both the architecture and the brooding portrait of Michelangelo.

• How the room’s four walls of philosophy, poetry, theology, and justice form a vision board for the papal mind
• Leonardo as Plato, Bramante as Euclid, and a self-portrait tucked in beside Ptolemy
• A vascular surgeon’s diagnosis of varicose veins on the Heraclitus figure believed to be Michelangelo
• Pouncing, wet plaster deadlines, and why the last-minute additions reveal Raphael revising as he painted
• The Vatican’s no-exact-copy rule and the University of Virginia replica painted four inches off scale