Parts of the foundation, some broken columns, capitals and two statue pedestals is all that has survived from the large marble building, which is believed to have beena temple dedicated to Demeter and her daughter (kore) Persephone. An inscription found nearby suggests that a sanctuary dedicated to the 'two goddesses' had existed prior to the construction of the temple. The location as well as the association of the goddess of agriculture with Thorikos, according to the Homeric Hymn to Demeter ("I was abducted by pirates. After a while, sailing with their swift ship, they landed at the harbor of Thorikos"), make it all the more plausible that there was a sacred site linked with the cult of Demeter.
Dated to the fifth century BCE, the Doric building in the form of a double gallery (stoa) had 14 columns, an entrance on its long sides, but no typical cella. It is most unusual that the interior was divided into halfwith a wall along its length.It has yet to be determined whether the temple was completed or not,as inferred by the bosses (protruding small knobs facilitating the raising and inserting of stone parts) on the columns. Nevertheless, it is certain that some of its architectural memberswere transferred and added to the temple of Demeter and Kore in the Athenian agorain the first century CE.