The Palace of Ardashir Pāpakan, also known as the Atash-kadeh آتشکده, is a castle located on the slopes of the mountain on which Dezh Dokhtar is situated. Built in AD 224 by King Ardashir I of the Sassanian Empire, it is located two kilometers north of the ancient city of Gor, i.e. the old city of Artakhsher Khwarah/Khor Adashir/Gor Adesheer in Pars, in ancient Persia (Iran). The ancient city where the palace is located, was renamed "Peroz" after Ardashir established the Sassanian Empire by overthrowing Ardavan, the last Parthian king. After the Arabian conquest, Peroz was called Firuz, and the name remained. The modern city of Firuzabad is hence, of important significance in Persian history.

Ardashir I, also known as Ardashir the Unifier, was the founder of the Persian Sasanian Empire. He was also Ardashir V of the Kings of Persis, until he founded the new empire. After defeating the last Parthian shahanshah Artabanus IV on the Hormozdgan plain in 224, he overthrew the Arsacid dynasty and established the Sasanian dynasty. Afterwards, Ardashir called himself "shahanshah" and began conquering the land that he called Iran.