http://agathe.gr/guide/bouleuterion.html
Bouleuterion Just uphill from the Tholos was the Bouleuterion, meeting place of the boule, or senate. Five hundred Athenian citizens were chosen by lot to serve for a year, and met in this building every ... Bouleuterion Just uphill from the Tholos was the Bouleuterion, meeting place of the boule, or senate. ... Model of the Old Bouleuterion. The remains are in a miserable state of preservation, with only the outlines of walls discernible in trenches sunk into bedrock. ... Restored perspective view of the interior of the Old Bouleuterion, ca. 500 B.C.