The structure of the tetrastyle temple was discovered by G. Pesce in the 1950s. The temple was probably erected in the 1st century BC on top of pre-existing structures that were filled in with large amounts of archeological debris.
Only a part of the temple basement is preserved. The basement was rectangular in shape and made of squared blocks of sandstone. The rest of the temple consisted of a tetrastyle pronaos with the typical four columns and a shrine or altar with a tripartite foundation that was completely destroyed.
It is hypothesized that this temple was dedicated to the Capitoline Triad (Jupiter, Juno and Minerva) but there is no archaeological confirmation for this.
Immediately after the Pesce excavation, for purely tourist purposes, two of the pronaos columns were rebuilt and Corinthian – Italic capitals were placed on top of the columns.