Explanation: Painted when the artist was almost eighty, this work represents Apollo, god of poetry and music, surrounded by the nine Muses, embodiments of the arts. At the upper right, the winged horse Pegasus has dislodged a rock, thus releasing the waters of Hippocrene, the fountain of the Muses and the source of artistic inspiration.

The running brook is the Castilian spring, which, like another, the Pierian,
was a source of inspiration and learning where we are advised to drink deep.