[1] There is a collection of objects dating from the 5th century BC, when the reputation of the temple was panhellenic, and the number of believers who moved there in order to attend the ceremonies of the Eleusinian mysteries had increased significantly.
The Votive piglet reminds the sacrifice of these animals for the purgation of the believers at Phaleron, which took place in some of the preparatory stages of the ceremonies, and the kernos, a ceremonial vessel which was used at the sacrifices and at the offerings made to the altars and the temples, during the return of the sacred symbols through the Holy Road from the Ancient Agora back again to the Sanctuary for the final initiation.
Among the most important exhibits of the museum are included: the monumental protoattic amphora [2] from the middle of the 7th century BC, with the depiction of Medusa's beheading by Perseus, the famous "fleeing kore" [3] from the archaic period, that probably comes from the architectural design of the Sacred House, the large headless statue of the goddess Demeter, probably the work of Agorakrito's school - a student of Pheidias-, and the Caryatid from the roof of the small Propylaea, bringing on her head the ciste, the container holding the sacred articles of the ceremony, with a relief appearance of the symbols of the Eleusinian cult, which are: the ear of grain, the poppies, the rozetes and the kernos.
The first is the relief of the 5th century BC, height 2.20 m, showing Demeter, the Kore and the King of Eleusis Triptolemos, who is preparing to teach agriculture to the world, according to the instructions of the goddess.
In addition, the museum houses a full collection of pottery, dating from Middle Helladic Era (2000 or 1950-1580 BC) to the early Christian times, written tables, metal items, inscriptions and reliefs, including the important votive relief of Rheitoi, with Demeter, the Kore, Athena and an Eleusinian man, which at the bottom has instructions for bridging the lake of Rheitoi (Koumoundourou lake).