The tomb of Darius I is located at Naqš-i Rustam, approximately 5 kilometers from Persepolis, the capital of the ancient Achaemenid empire. The tomb is shaped like a cross and in its upper arm is a relief showing Darius I praying to the god Ahuramazda (who is shown as a winged disk). The twenty-eight people shown represent the subject nations. They are carrying the platform on which Darius is standing.

See also-

Livius.org- Naqš-i Rustam