This propagandistic text from the Iranian plateau is a Persian, Elamite and Babylonian account of the deeds of Darius the Great. It was probably aimed at the legitimation of the kingship of Darius, not a direct descendant of Cyrus and Cambyses, and it is a source of primary importance because it compares to the Greek historical account of Herodotus (book III). Given the size of the Persian Empire it is easy to understand why it was written in three languages, but why write it 30 m high?