From Connolly and Dodge, The Ancient City
The original Bouleuterion1 or meeting place for the Council of 500 (2) was located next to the Tholos (4), but was replaced by a new Bouleuterion (3) at the end of the fifth century.2 This new building contained a theater-like seating arrangement for the Council.
Note
1. Bouleuterion means 'place
for planning'.
2. At which time the
old Bouleuterion was converted into a sanctuary for the Mother goddess (Mêtrôon),
which was also used to house an archive for public records.