Tachara
Marvdasht County, Iran
The Tachara, or the Tachar Château, also referred to as the Palace of Darius the Great, was the exclusive building of Darius I at Persepolis, Iran. It is located 70 km northeast of the modern city of Shiraz in Fars province.
Palace data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).