The jar contains the same short inscription in Old Persian, Egyptian, Babylonian, and Elamite:[1][3][4]
𐎧𐏁𐎹𐎠𐎼𐏁𐎠 𐏐 𐏋 𐏐 𐎺𐏀𐎼𐎣
(Xšayāršā : XŠ : vazraka)
"Xerxes : The Great King."
— Old Persian inscription on the Jar of Xerxes, Mausoleum at Halicarnassus.[3]
The function of this jar is not well known. It may have contained some of the water from the Nile, received as a symbol of submission.[1] A few other examples of broadly similar jars are known throughout the Achaemenid Empire, including jar from Darius I.[1] The jar may have been part of the collection of the Carian Satrap, and testifies to the close contacts between Carian rulers and the Achaemenid Empire.[1][3]
The vases, of Egyptian origin, were very precious to the Achaemenids, and may therefore have been offered by Xerxes to Carian rulers, and then kept as a precious object.[4] In particular, the precious jar may have been offered by Xerxes to the Carian dynast Artemisia I, who had acted with merit as his only female Admiral during the Second Persian invasion of Greece, and particularly at the Battle of Salamis.[5]