Further information: Achaemenid architecture An apadana (Persian: آپادانا) is a large hypostyle hall, the best known examples being the great audience hall and portico at Persepolis and the palace of Susa. The Persepolis Apadana belongs to the oldest building phase of the city of Persepolis, the first half of the 5th century BC, as part of the original design by Darius the Great. Its construction completed by Xerxes I. Modern scholarships "demonstrates the metaphorical nature of the Apadana reliefs as idealised social orders".