The Old Persian block contains characters used in the Old Persian cuneiform script, which was used in the Achaemenid Empire during the 6th to 4th centuries BCE. The script was used primarily for royal inscriptions and is one of the three cuneiform scripts found in the Behistun Inscription, a trilingual inscription that was key to the decipherment of cuneiform. The Old Persian script is an alphabetic cuneiform script, with 36 characters representing consonants and vowels. This block includes all the characters needed to read Old Persian inscriptions, providing a window into the history and culture of the ancient Persian Empire..