It was found in the main cell of an underground " temple depository " . These basement cells , only accessible from above , were neatly covered with a layer of fine plaster . Their content was poor in precious artifacts , but rich in black earth and ashes , mixed with burnt bovine bones . In the northern part of the main cell , in the same black layer , a few inches south-east of the disc and about above the floor , Linear A tablet '' PH 1 '' was also found . The site apparently collapsed as a result of an earthquake , possibly linked with the eruption of the Santorini volcano that affected large parts of the Mediterranean region during the mid second millennium B.C
eruption
Minoan eruption
Phaistos Disc