Temple of Athena
It has a rectangular cella, measuring 16,4 x 11,6 m. The foundation of the pedestal supporting the cult statue is preserved on the west side of the cella, while four Ionic columns in the centre supported the roof. One of the peculiarities of the temple, mentioned also by Vitruvius, is the existence of an outer colonnade only on the east and south sides.
Some shcolars consider that the temple of Athena Sounias was reconstructed after the mid-5th century B.C., while others believe that the cella was built during the Archaic period, was repaired after the Persian destructions, and the colonnade was added in the middle of the 5th century B.C. A second peculiarity of the sanctuary is the placement of the altar to the south of the temple.