The archaeological site of Takht-e Soleyman, (“Throne of Solomon”) in north-western of Iran, West Azerbaijan province is situated in a valley set in a volcanic mountain region. The site includes the principal Zoroastrian sanctuary partly rebuilt in the Ilkhanid (Mongol) period (13th century) as well as a temple of the Sasanian period (6th and 7th centuries) dedicated to Anahita. The site has important symbolic significance. The designs of the fire temple, the palace and the general layout have strongly influenced the development of Islamic architecture. Takht-e Soleyman was the principal sanctuary and foremost site of Zoroastrianism, the Sasanian state religion. This early monotheistic faith has had an important influence on Islam and Christianity; likewise, the designs of the fire temple and the royal palace, and the site’s general layout, had a strong influence on the development of religious architecture in the Islamic period, and became a major architectural reference for other cultures in both the East and the West. The site also has many important symbolic relationships, being associated with beliefs much older than Zoroastrianism as well as with significant biblical figures and legends. The 10-ha property also includes Tepe Majid, an archaeological mound culturally related to Zendan-e Soleyman; the mountain to the east of Takht-e Soleyman that served as quarry for the site; and Belqeis Mountain 7.5 km to the northeast, on which are the remains of a Sasanian-era citadel. The archaeological heritage of the Takht-e Soleyman ensemble is further enriched by the Sasanian town (which has not yet been excavated) located in the 7,438-ha landscape buffer zones.