XI. The Hall of Initiation at Eleusis.—The great Hall of Initiation, to which the paved road leads from the smaller portal, is a vast single chamber about a hundred and seventy feet square, the sides of which face north, south, east, and west. The whole of the west side, together with the western parts of the northern and southern sides, are bounded by the rock of the acropolis, which has been cut away perpendicularly to make room for the hall. The roof was supported by six rows of columns, seven columns in each row: the bases of all these columns except one are still to be seen in their places. Eight tiers of steps, partly cut in the rock, partly built, ran all round the chamber except at the entrances, of which there were six, namely, two on the north, two on the east, and two on the south. On these tiers of steps the initiated probably sat watching the performance of the mysteries which took place in the body of the hall. It is calculated that about three thousand people could find room on them. The steps, originally narrow, were widened at a later date by a casing of marble. That this marble casing of the steps is a late work appears from the use of mortar to fasten it on.
There are passages of ancient writers which seem to imply that besides the place to which the initiated had access there was an inner Holy of Holies called the anaktoron or megaron, which none but the high-priest of the mysteries might enter, and which, being suddenly thrown open, disclosed to the view of the awestruck beholders the most sacred objects of their religious veneration lit up by a blaze of dazzling light. But no trace of any inner chamber or enclosure has been discovered in the great Hall of Initiation. It may therefore be suggested that the anaktoron or megaron was perhaps nothing but the body of the hall, which may have been screened by curtains from the spectators sitting in darkness on the tiers of seats that ran all round it, till suddenly the curtain rose and revealed the vast hall brilliantly illuminated, with the gorgeously attired actors in the sacred drama moving mazily in solemn procession or giddy dance out and in amongst the forest of columns that rose from the floor of the hall, while the strains of grave or voluptuous music filled the air. Then, when all was over, the curtain would as suddenly descend, leaving the spectators in darkness and silence, with nothing but the memory of the splendid pageant that had burst upon them and vanished like a dream.