Doric temple constructed in around 500 B.C.; under its cella were revealed the foundations of an earlier temple, dating back to the beginning of the 7th century B.C. In the remains of this earlier temple, a large number of Archaic vases and other votive offerings were found (now exhibited in the museum), many of which bear incised votive inscriptions to Hera. The altar of the goddess was erected to the south of the temple.