Magus

Magus, plural Magi, names the priestly office of Zoroastrianism, an office whose Greek speaking reputation for ritual knowledge, astrology and fire tending gave the English language the word magic. The Magi began as a priestly clan of the Medes, the people of ancient Media in what is now northwestern Iran, serving religious and funerary rites that predate Zoroaster's teaching; the Bisitun inscription of Darius the Great even records a Magian revolt against Achaemenid rule in 522 BCE, suggesting a priesthood with independent standing rather than one simply created by the Zoroastrian faith it later came to serve.

As Zoroastrianism spread and consolidated across the Persian world, the Magi became identified as its priesthood proper, responsible above all for tending the sacred fires that remain the religion's central ritual focus, along with funerary rites, purification and the recitation of the Avesta's liturgical texts. Modern Zoroastrian priesthood preserves a graded structure inherited from this history: the ervad is a priest in minor orders qualified for basic ritual duties, the mobed is a fully ordained priest able to perform the complete range of ceremonies, and the dastur is the senior rank associated with a fire temple housing the religion's highest grade of consecrated fire.

Mary Boyce's foundational study of Zoroastrian belief and practice traces this priesthood's continuity across nearly three thousand years of documented history, from its pre-Zoroastrian Median origins through its role as guardian of the empire's official religion under the Achaemenid, Parthian and Sasanian dynasties, to its much reduced but unbroken survival into the present day.

The Arab conquest of Sasanian Persia in the seventh century CE, and the centuries of gradual Islamization that followed, transformed the Zoroastrian priesthood from an imperial institution with courts, secular offices and state backing into a minority clergy serving a shrinking religious community. Boyce's account traces how court priests and priests holding secular administrative roles disappeared first and fastest, since those positions depended directly on a Zoroastrian state that no longer existed, while priests serving fire temples and performing life cycle rites for ordinary believers proved more resilient, surviving where a Zoroastrian population remained to support them.

Two main Zoroastrian priestly lineages continue this office today: mobed families in Iran, concentrated particularly around Yazd and Kerman, and priests serving the Parsi community of India, descended from Zoroastrians who emigrated from Persia beginning around the tenth century to escape persecution and preserve their faith. Priesthood in both communities remains hereditary, passed through specific priestly families, a structure that has both preserved ritual continuity across many centuries and limited the number of qualified priests available as those communities have shrunk in the modern period.

Fire temple service remains the priesthood's central and most visible duty: tending the sacred fire, which in the highest grade of temple is never allowed to go out and is fed according to strict ritual protocol, alongside performing the naujote initiation that admits a child into the faith, funerary rites, and the calendar of seasonal and life cycle observances that structure Zoroastrian religious life for the laity the priesthood serves.