Two Germans, Friedrich Adler and Ernst Curtius who prepared the five year programme of the first excavations of Olympia – they had officialy began in 1875 – were responsible for the final plan of the museum. Wilhelm Dörpfeld, who was responsible for supervising the excavations also took part in the display of the finds.
Overlooking the ruins of the Sanctuary, the Kronos hill, the Alpheus and the Kladeus rivers, the building was constructed by a very generous donation of 220,000 drachmas from the banker and national benefactor Andreas Syngros whose name was inscribed on the architrave (SYNGREION) above the main entrance.
The catastrophic earthquakes of 1953 caused much damage to the Syngreion. In the meantime, the progress of the excavations in the Altis and the new finds that gradually came to light made it imperative that a new larger museum be constructed, which would corresponded to the post-war era’s archaeological circumstances and requirements.
The Old Museum remained functional, but at the same time, from the late 1950s onwards, work began on the foundations of the New Archaeological Museum in the valley northwest of Kronos hill.
The building, completed in the decade from 1960 to 1970, was based on a proposal by the architect Patroklos Karantinos.
The ground plan of the new museum followed the same rectangular layout of the Syngreion. Apart from a vestibule it contained a large central hall for the sculptures from the Temple of Zeus, around which nine other exhibition galleries were arranged in a U-shape.
Since the Olympic Games in Munich (1972) the New Archaeological Museum was completely ready with organised storage facilities, conservation workshops, Chalkotheke, and offices housing the Ephorate administration, and was receiving visitors, while at the same time, beginning in 1974, the work to re-exhibit the sculptures from the Temple of Zeus in the main hall was ongoing.
The antiquities were gradually transferred there to have newly discovered fragments affixed, to be reassembled with new joints made of a more durable material, and to have p laster casts made for teaching purposes.