Velificatio is a stylistic device used in ancient Roman art to frame a deity by means of a billowing garment. It represents "vigorous movement," an epiphany, or "the vault of heaven," often appearing with celestial, weather, or sea deities. It is characteristic of the iconography of the Aurae, the Breezes personified, and one of the elements which distinguish representations of Luna, the Roman goddess of the Moon, alluding to her astral course.