There are also several accompanying images on the pediment, such as Tritons (the half-fish and half-men servants to Neptune), a face-helmet shaped like a dolphin's head, a small owl, and female Victories standing on globes.

[1] A 2016 study by Eleri H. Cousins identified elements of imperial iconography within the pediment, including the Victories, an oak wreath, and a star at the apex.

[4] Cousins also noted similarities between this imagery and architectural features in Gaul and Hispania, arguing that the Forum of Augustus served as a stylistic archetype.

[16] The prevailing view among scholars is that the image represents a deliberate syncretism—combining Minerva's Gorgon emblem with the face of a local water deity associated with the sacred spring.

[4] Archaeologist R. G. Collingwood appreciated the meeting of Roman and Celtic art,[17] finding that the sculptor creator was a "skilled artist".