The Behistun Inscription is a multilingual inscription and large rock relief on a cliff at Mount Behistun in the Kermanshah Province of Iran, near the city of Kermanshah in western Iran, established by Darius the Great. It was crucial to the decipherment of cuneiform script as the inscription includes three versions of the same text, written in three different cuneiform script languages: Old Persian, Elamite, and Babylonian. The inscription is to cuneiform what the Rosetta Stone is to Egyptian hieroglyphs: the document most crucial in the decipherment of a previously lost script.
Authored by Darius the Great sometime between his coronation as king of the Persian Empire in the summer of 522 BC and his death in autumn of 486 BC, the inscription begins with a brief autobiography of Darius, including his ancestry and lineage.
Wikipedia https://en.wikipedia.org/wiki/Behistun_Inscription
Address Iran
Coordinates 34°23'25.652" N 47°26'9.444" E