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The Encyclopaedia Iranica Foundation was established in 1990 with the mission to guarantee the Encyclopædia Iranica's intellectual independence and ensure its ongoing publication both in digital and print versions. Learn More
The Encyclopædia Iranica is a comprehensive research tool dedicated to the study of Iranian civilization in the Middle East, the Caucasus, Central Asia, and the Indian subcontinent.
The plain of Fīrūzābād has been inhabited since prehistoric times, with a major Chalcolithic site, Tall-e Rīgī, in the south. Surrounded bys mountains with few access roads, it was chosen by Ardašīr-e Bābakān as the key stronghold in his revolt against the last Parthian king.
Highly relevant are the subjects Mithraism and Zurvanism. It is here assumed that the exposure of Zoroastrian priests to Near Eastern divination, from the Achaemenid period on, helped foster cosmological speculation; and this developed a body of myth around Zurwān “Time.”