In 1923, the German archaeologist Ernst Herzfeld made casts of the inscriptions on the tomb of Darius I. Since 1946, these casts have been held in the archives of the Freer Gallery of Art and the Arthur M. Sackler Gallery, Smithsonian Institution, in Washington, DC.

Naqsh-e Rostam was excavated for several seasons between 1936 and 1939 by a team from the Oriental Institute of the University of Chicago, led by Erich Schmidt.
In 1923, the German archaeologist Ernst Herzfeld made casts of the inscriptions on the tomb of Darius I. Since 1946, these casts have been held in the archives of the Freer Gallery of Art and the Arthur M. Sackler Gallery, Smithsonian Institution, in Washington, DC.
Naqsh-e Rostam was excavated for several seasons between 1936 and 1939 by a team from the Oriental Institute of the University of Chicago, led by Erich Schmidt.
Naqsh-e Rostam