The grotto had a richly decorative marble pavement and its vaults consisted of three naves covered in stone decorated with shells made by the rocaille sculptor Delaunay in 1665. The niches highlighted the central group of Apollo served by the nymphs of Thetys carved by François Girardon and Thomas Regnaudin in 1675. Two other groups flanked Apollo: The Horses of the Sun, Eous, Aethon, Pyrois and Phlegon groomed by Tritons carved by the sculptors Guérin and the Marsy brothers.
Full title : View of the back of the Thetys Grotto of Versailles with the marble groups of the “Sun in the middle of the Nymphs of Thetys” and his “Horses groomed by Tritons”