premise: Key features are the horseshoe-shaped staircase (Escalier du Fer-? -Cheval) at the end of the stately Cour du Cheval Blanc; the Renaissance ballroom whose ornate ceiling is reflected in the parquet floor; and the allegorical paintings in the Galerie Francois Ier.
hypothesis: You can see the reflection of the ornate ceiling in the floor of the Renaissance ballroom.