The scene of Jupiter and Io is inspired by Ovid's classic Metamorphoses. Io, daughter of Inachus, the first king of Argos, is seduced by Jupiter (Zeus in Greek), who hides behind the dunes to avoid hurting the jealous Juno (Hera in Greek). Jupiter was often tempted by other women and took on various disguises in order to cover his various escapades, one time taking the form of a swan, another time of an eagle, and in this painting he is not becoming something else so much as enveloping himself in a dark cloud, even though it is bright daylight.