The Doric Temple stood on the spur that dominated the bay in which the harbour is located, built entirely of limestone (6th century BC), with a multi-coloured terracotta roof, continually updated over the years, as evidenced by the architectural terracotta now exposed at the Antiquarium. The layout of the temple and the shape of the columns recall the Greek Doric style with adaptations and concessions to the local tradition in the Campania region.

An inscription in the Oscan language has allowed the attribution to Athena and the goddess seems associated with Hercules even in the clay decorations, in sculptures, reliefs and antefixes. With the Sanctuary of Apollo it was one of the sacred poles of the city, a place of integration and safekeeping of social order.

Date of excavation: from the 18th century.