[3] The cult of Apollo, imported from Greece, was widespread in Campania, and from excavations in the temple's vicinity has been shown to have been present in Pompeii since the 6th century BC.
The temple itself, a peripteros with 48 Ionic columns, was on a high podium and entered up an imposing set of steps, in a fusion of Greek and Italic architectural ideas.
In front of the steps may still be seen a white marble altar on a travertine base, with a Latin inscription giving the names of the quattuorviri who dedicated it.
[6] The fragments belong to the temple's deities – one representing Apollo, the other a bust of Diana – both of which would have been facing the columns of the portico.
The elegant Doric architrave of metopes and triglyphs resting on the columns was transformed into a continuous frieze with griffins, festoons and foliage.