Achaemenid Tombs at Naqsh-e Rustam, also referred to as the Necropolis of the Persian crosses. The four tombs belonging to the Achaemenid kings are carved out of the rock face with the entrance to each tomb at the center of each cross, this opens onto to a small chamber, where the king lay in a sarcophagus. The horizontal beam of each of the tomb’s facades is believed to be a replica of the entrance of the palace at Persepolis. One of the tombs is that of Darius I the Great (c. 522-486 BC). The other three tombs are believed to be those of Xerxes I (c. 486-465 BC), Artaxerxes I (c. 465-424 BC), and Darius II (c. 423-404 BC) respectively.