Question: what is apadana in architecture?
Answer: Apadana (Old Persian: 𐎠𐎱𐎭𐎠𐎴) is a large hypostyle hall, best said 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 6th century BC, as part of the original design by Darius the Great.