The painted medallions on the ceiling are designed to look like bronze.
These round shields are illusionistic paintings rather than separate metal objects. Michelangelo placed them among the decorative elements surrounding the nine central Genesis scenes, where pairs of ignudi appear to support or hold them. Their dark, metallic coloring creates the impression of bronze reliefs attached to the ceiling’s painted architecture.
The medallions contain scenes drawn from several Old Testament books, including Genesis, Samuel, Kings, and Maccabees. They are not simply blank ornaments: their small biblical episodes expand the ceiling’s wider themes of violence, sacrifice, kingship, judgment, and divine intervention. Ten medallions are generally identified in the decorative scheme, although one is largely undecorated or difficult to interpret.
A frequent mistake is to treat the medallions as actual bronze plaques. The Sistine Chapel ceiling is a fresco cycle, and these objects are part of its painted illusion. They also differ from the simulated marble and stone architectural elements elsewhere on the vault. Michelangelo used painted color, highlights, and shadows to make flat plaster resemble sculpted and metallic forms.