|Summary:||Complex of courts and rooms; west and slightly north of the Sacred Lake.|
|Date:||ca. 125 BC - 100 BC|
Column height: ca. 5.3 m.
A door on the southern side let into a short hall leading to a court with a colonnade on its western side, opening into 4 chapels. West of the entry were small rectangular rooms. East of the 1st court was a rectangular peristyle court with a Doric colonnade and a cistern. On the northwest corner of the structure and entered from the peristyle court was another court with a mosaic pavement, probably a meeting or reunion hall. In the southeast corner were reception halls with halls and shops below in a basement.
Mixed Greek and Syrian design. Built by Syrian merchants and ship owners from Beirut during the time when Delos was briefly the commercial center of Greece, and used as a guild hall or club house. Baal, whom they principally worshipped, was identified with Poseidon, hence the name, Poseidoniasts.