This blue peg came from the Southeast Palace during the Achaemenid period in Iran. The peg has an inscription of Darius I (522-486 BC), the founder of Persepolis: "Knobbed peg of precious stone (or lapis lazuli) made in the house of Darius the King." The peg uses cuneiform to write this inscription in 3 languages: Old Persian (an Indo-European language), Akkadian (a Semitic language), and Elamite (a linguistic isolate, indigenous to western Iran).