Actual state plan of the "Heliaia" (now identified as the Aiakeion) ... John Travlos ... PD 1299 Horizontal (normal) ... 1964
Actual state plan of the Heliaia. (revised 1990) ... J. Travlos R.C. Anderson ... PD 1299 Horizontal (normal) ... 1960
Clock Unknown Limestone Fair ... 350-300 B.C.
Hydraulic Unknown Limestone Very poor, foundations only ... 350-300 B.C.
