Shapur I's inscription at the Ka'ba-ye Zartosht

Shapur I's Ka'ba-ye Zartosht inscription (shortened as Shapur-KZ, ŠKZ,^[1] SKZ^[2]), also referred to as The Great Inscription of Shapur I,^[2][3] and Res Gestae Divi Saporis (RGDS),^[2][1] is a trilingual inscription made during the reign of the Sasanian king Shapur I (r. 240–270) after his victories over the Romans.^[1] The inscription is carved on the Ka'ba-ye Zartosht, a stone quadrangular and stepped structure located in Naqsh-e Rustam, an ancient necropolis located northwest of Persepolis, in today's Fars Province, Iran.^[1] The inscription dates to c. 262.^[2]