The depiction of Apollo, caught in his palace as he prepares to drive the golden chariot of the sun, is a very frequent iconographic motif in the decoration of noble residences between the sixteenth and eighteenth centuries. The literary source consists of Ovid's Metamorphoses and the allusion to identifying the shining god with the commissioner of the work as well as the Palazzo del Sole with the patrician residence well suited to the needs of decorum and self-celebration so dear to the ruling class of the "century of gold ". The theme is addressed by Piola in a rather literal transposition of Ovid's text. In the palace of Apollo, in addition to Chronos, the Months, Days, Hours resolved in the painting live as transparent figures, in contrast with the Baroque redundancy of the composition. The protagonist of the pace of Time are, however, the Seasons, which gather around Apollo, rendered with a compositional and chromatic happiness that alternates dark tones for the colder seasons to the bright ones for those of the prosperity of the year. Spring opens the way to the chariot, crowned with flowers, caught in the act of scattering petals, also identifiable with Aurora who, according to tradition, precedes the chariot of the sun. Radiated with intense light, the figure of this young woman forms the trait d’union with the lower part of the painting, where Autumn and Winter find their place. The exhibition is closed by Summer, a young woman holding the fruits of her season in her hand, flanked by a putto with a bundle of ears. True incipit of the cycle of frescoes in Palazzo Rosso by Piola himself and Gregorio De Ferrari, of which he anticipates the themes, this painting was not, however, executed to be placed in its current location and was made much earlier, in the forties, when the collaboration with his brother-in-law Stefano Camogli was assiduous, to whom the floral parts were entrusted, which also in this painting are completely attributable to him. Purchased by Ridolfo Brignole - Sale in 1679 to place it in the hall, it was on that occasion enlarged by Piola himself.