Editing Eleusinion (section)

===South Stoa===
The South Stoa was added on the south side of the upper terrace in the second century BC, replacing the archaic peribolos.{{sfn|Miles|1998|pp=76, 79-80}} This stoa provided a sheltered area facing the temple of Triptolemus, which was used for dedications and for visitors to the sanctuary.{{sfn|Miles|1998|p=75}} It measures 8.90 metres from north–south. The excavated portion is 25.40 metres long, but the stoa continued further east into the unexcavated area.{{sfn|Miles|1998|p=76}} Fragments from the superstructure indicate that the steps were made of Hymettan marble, while the columns and entablature were [[Pentelic marble]]. The columns were roughly three metres apart and were probably [[Doric order|Doric]].{{sfn|Miles|1998|pp=77-78}} It was probably only one story high, but this is not certain.{{sfn|Miles|1998|p=78}} A set of diamond and oval lattice window frames might come from a second-story balustrade or from the western and eastern walls.{{sfn|Miles|1998|p=78}} At the east end, the back wall is preserved to a height of 2.75 metres.{{sfn|Miles|1998|p=76}} The interior floor was a layer of beaten earth, which slowly wore away until visitors were walking directly on the bedrock.{{sfn|Miles|1998|p=78}}

Three phases of construction are attested in the back (south) wall. In the first, preserved for the western 18.5 metres, the foundation was built from regular yellow poros [[orthostate]]s (0.65 metres high, 1.15 metres long, 0.42 metres thick), connected together with wooden clamps, and topped by dressed masonry. A second-century BC date for this initial phase is indicated by pottery in the fill of the foundations and by the absence of [[Mortar (masonry)|mortar]].{{sfn|Miles|1998|pp=76, 79-80}} In the second stage, in the late Roman period, the orthostates were patched using irregular limestone blocks topped brick and mortar (preserved in the eastern portion).{{sfn|Miles|1998|p=76}} Finally, in Byzantine times, the wall was patched again with brick and stone, serving as a wall for later structures.{{sfn|Miles|1998|p=76}} At the north side of the stoa, a 1.5 metre wide cutting runs the whole length of the stoa. Conglomerate blocks sat in this cutting supported the front steps and columns.{{sfn|Miles|1998|p=77}} The short western exterior wall had bases for mounting inscriptions, which could be read by passers-by on the Panathenaic Way.{{sfn|Miles|1998|p=77}}

Destruct debris shows that the stoa went out of use in the late fourth century. By the 6th century, parts of its structure had been incorporated into new buildings and a ramp had been built through the back wall to allow access to the east–west road behind it.{{sfn|Miles|1998|p=80}}