The CHO (Cultural Heritage Organization) has renovated the main sections of Persepolis palace, such as Sad-Sotoun (100 Columns) in the southeastern section, the southeastern gate, the Hadish Palace, and the Gate of Nations.

The tomb of Dariush the Graeat, the tomb of Cyrus the Great, the gates of Nations' Palace, and the image of the winged man have also been renovated.

Persepolis, the ancient capital of Achaemenid dynasty (c. 550-330 BCE, the Second Iranian dynasty), is the most important historical and architectural monuments of Iran and the world, and has been registered as a world historical monument.

Persepolis is 135,000 square meters in area, and was built on the vast plateau of Marvdasht, on the slope of Rahmat Mountain.