Pinax of Persephone opening the "Liknon Mystikon". 

Found in the holy shrine of Persephone at Locri in the district Mannella. Locri was part of Magna Graecia and is situated on the coast of the Ionian Sea in Calabria in Italy. 

Source: Wikipedia

This stone panel relief shows Persephone sitting at a desk, opening a box.  The desk has a two handled vase ditting under it.  A small hand mirror hangs on the wall. A small flask sits on the desk behind the box.