Apadana is a large hypostyle hall in Persepolis, Iran. It belongs to the oldest building phase of the city of Persepolis, in the first half of the 6th century BC, as part of the original design by Darius the Great. Its construction was completed by Xerxes I. Modern scholarship "demonstrates the metaphorical nature of the Apadana reliefs as idealised social orders".

The Palace of Darius in Susa was a palace complex that was built at the site of Susa, Iran, during the reign of Darius I over the Achaemenid Empire. The construction was conducted parallel to that of Persepolis. Manpower and raw materials from various parts of the Achaemenid Empire contributed to its construction. It was once destroyed by fire and was partially restored later; little has remained from the complex, which is today part of an archaeological site.