'Treasure Book') is located 12 km southwest of Hamadan (ancient Ecbatana) in western Iran, at an altitude of c. 2000 meters across Mount Alvand.

[1][2][a] The two inscription panels of Ganjnameh, carved in stone in 20 lines on a granite rock above a creek, measure 2 × 3 m each.

[1][2] Written in Old Persian, Neo-Babylonian and Neo-Elamite, except for the different royal name, the contents of the two inscriptions are identical; Ahura Mazda receives praise, and lineages and conquests are listed.

[1][2] According to Stuart C. Brown, in the pre-Hellenistic period, this mountain was apparently the main "east-west pass" through Mount Alvand.

[1] During the Achaemenid period, Ecbatana functioned as summer capital due to its high elevation and pleasant weather.