The remains of the temple of Zeus and Athena Polias are at the highest point of the Philerimo hill. It is an amphiprostyle tetrastyle Doric temple of poros. The foundations for the cult statue are preserved at the north end of the cella.
Architectural members from the ancient temple were used in the construction of the three-aisled Early Christian basilica erected on the same site in the 5th or 6th c. AD, of which the baptistery is still preserved, in the area of the south aisle. The baptistery is in the shape of a cross, the arms of which have curved ends, and the interior is revetted with marble slabs. The north aisle of the basilica, which is precisely above the ancient temple, was repaired in the Byzantine period and converted into an aisleless church.
Source: Ministry of Culture & Tourism