Since ancient times, artists have depicted river gods as reclining bearded men, often holding or leaning on a large urn pouring water. This example, a preparatory sketch for a painting, personifies the Tiber River, which plays a role in Rome’s legendary origins. Romulus, the founder of Rome, and his twin brother, Remus, were abandoned as infants at the river, where they were rescued by a she-wolf. Poccetti lightly sketched the animal’s head behind the river god along with the face of Romulus or Remus.