The Ploutonion, or temple of Pluton, was the inaugural holy site visible upon entering the Eleusinian sanctuary, evoking both dread and wonder among those uninitiated into the profound tranquillity and enlightenment promised by Demeter’s mysteries. This cave, rather modest in depth, offered only a glimpse of its shadowy depths to those journeying along the Sacred Way. Its interior featured two smaller recesses, divided by a natural rock ledge, with the temple of Pluton situated in front of the larger chamber. The northern wall of the lesser recess houses a notable aperture, observable from the Sacred Way, and in front of this, a six-step stairway hewn into the rock. The precise purpose of this feature remains speculative, but it might have symbolised Persephone’s return from Hades, with a priestess ascending the steps to emerge before the devotees.
This situation presents a geographical conundrum. The mythological narrative clearly states that Persephone’s abduction occurred in the Nysian Plain. Despite their desires, the Eleusinians could not authentically assert that the cave’s entrance was the actual site of this mythic event. Nevertheless, this did not hinder them from integrating the theme of Kore’s return into the Greater Mysteries’ ceremonies, with the cave’s compelling ambience serving as a dramatic setting for the annual depiction of Persephone’s rise from the Underworld.
During Peisistratos’ reign, a temple dedicated to Pluton, the Underworld’s ruler was constructed here. In the 4th century BCE, the Eleusinians embarked on an extensive renovation project, erecting a well-crafted retaining wall of poros stone, shaping a triangular courtyard and precisely defining the sanctuary’s boundaries. This courtyard, with a peribolos, was directly accessible from the Sacred Way, with steps located in the southeast corner. A more bigger edifice, featuring a pronaos and nave, took the place of the smaller Peisistratan temple, likely necessitated by Persian destruction. An inscription from the time of Cephisophon’s archonship (329/8 BCE) details expenditures on elm planks for temple doors, costs of refining pilasters and painting capitals, indicating the thoroughness and investment in this significant rebuilding effort.