|Summary:||Rectangular building; forming the northwest corner of the Sanctuary of Apollo.|
|Date:||ca. 480 BC|
14.75 m x 37.65 m.
Divided into 3 parts. The center section with door on the west was an open court, surrounded by a Doric peristyle, 4 columns to a side. There were 2 small cellas off of the peristyle court, one on the north side and one on the south side. In each cella were 4 interior Ionic columns, arranged in a square.
Hall used as a temple. Also known as the Sanctuary to Demeter and Persephone (Kore).