Indo-European religions

Ancient Iranian folk religion

Pre-Zoroastrian and popular Iranian religion, known indirectly.

1500 BCE – 1200 CEHistoricalScholarly reconstructionDraft · pending expert review

Overview

Ancient Iranian folk religion is the religious life of ordinary Iranians before, and alongside, the reform Zoroaster preached. It is known only indirectly: no text survives from before his own hymns, so scholars reconstruct it by comparing Vedic material and by reading later royal inscriptions. What emerges is a religion his teaching tried, and partly failed, to replace. Ordinary Iranians, and even some who accepted the reform, kept worshipping a class of older gods, the daivas, that Zoroaster rejected outright. Inscriptions centuries later record the state suppressing daiva worship in particular places, and later still naming the old popular gods Mithra and Anahita beside Ahura Mazda. The priesthood behind much of this religious life, the Magi, were remembered by outsiders mainly as diviners and dream-interpreters.[1–9]

History

Iranian villagers in wool and felt making offerings at an open-air stone altar on a mountain ridge, first millennium BCE, flocks behind them, misty dawn light
Iranian villagers in wool and felt making offerings at an open-air stone altar on a mountain ridge, first millennium BCE, flocks behind…Illustration · AI-generated

A rejected pantheon lives on c. 1st millennium BCE

Zoroaster's reform exalted the ahuras and condemned the daivas, an older class of gods, as demons. But the rejection was not instantly or universally accepted: other Iranian peoples kept venerating the daivas, and it appears some who had adopted Zoroaster's own teaching had once worshipped them as well, showing how gradual and incomplete the break with the older, popular religion was.[5, 9]

The daiva inscription mid-5th century BCE

An inscription of the Achaemenid king Xerxes I records that he put down the worship of "the daivas" at an unnamed place and had the worship of Ahura Mazda established there instead. Rather than a campaign against the daiva cult everywhere, this is usually read as the suppression of one local shrine to gods outside the ahura-centred state religion, evidence that daiva worship still had a real following somewhere in the empire two centuries after Zoroaster.[3]

Old gods, new recognition 4th century BCE onward

From the reign of Artaxerxes II, Achaemenid royal inscriptions begin naming Mithra and the goddess Anahita beside Ahura Mazda. Neither deity was new: both trace back, independently of Zoroaster, to the shared Indo-Iranian pantheon, and their appearance in state inscriptions looks like official recognition of cults the wider population had never stopped keeping.[6, 8]

People

The Magi

other

A Median priestly clan who, from at least Darius I onward, served as the official priesthood of the Achaemenid court. Greek writers remembered them chiefly as dream-interpreters and diviners, while Achaemenid administrative records from Persepolis show individual Magi receiving rations for performing libations to rivers and mountains and for the worship of Mithra.[4, 7]

Art & objects

Public-domain objects from museum collections. Select one to see it at the museum.

How we know

How we know

No scripture or first-hand account of ordinary Iranian religious life survives from this period. What is known comes from indirect comparison with Vedic India, from royal inscriptions that mention popular cults only when a king wanted to suppress or co-opt them, and from administrative archives, such as the Persepolis Fortification tablets, that record religious practice only incidentally, as a byproduct of tracking rations and supplies.[1–3, 6–7]

Common misconceptions

Myth Once Zoroaster preached, Iranians simply stopped worshipping the old gods.

Fact Centuries after Zoroaster, kings were still suppressing shrines to the daivas and, later, formally naming older popular deities like Mithra and Anahita in state inscriptions. Both facts point to the older religion persisting among ordinary people long after the prophet's own lifetime.[3, 5–6, 8–9]

Glossary

daiva · daēuua
A class of gods that Zoroaster's teaching rejected and progressively demonized, though they continued to be worshipped by other Iranians and, it seems, by some early followers of the reform.[5, 9]
Magi · magu-
A Median priestly clan who served as the official priesthood under the Achaemenid kings and were remembered by Greek writers chiefly as dream-interpreters and diviners.[4, 7]

Sources

Each statement above was checked against published sources; the verdict says whether it stood as written, was corrected or was hedged.

  1. VerifiedBritannica, Zoroastrianism; Encyclopaedia Iranica, Indo-Iranian Religion.
  2. VerifiedBritannica, Zoroastrianism; Encyclopaedia Iranica, Indo-Iranian Religion.
  3. VerifiedBritannica, Zoroastrianism; Encyclopaedia Iranica, DAIVA.
  4. VerifiedBritannica, Zoroastrianism; Encyclopaedia Iranica, MAGI.
  5. VerifiedEncyclopaedia Iranica, DAIVA; Britannica, Zoroastrianism.
  6. VerifiedBritannica, Zoroastrianism; Encyclopaedia Iranica, Indo-Iranian Religion.
  7. VerifiedEncyclopaedia Iranica, MAGI; Britannica, Zoroastrianism.
  8. VerifiedBritannica, Zoroastrianism; Encyclopaedia Iranica, Indo-Iranian Religion.
  9. VerifiedEncyclopaedia Iranica, DAIVA; Britannica, Zoroastrianism.

Last fact-checked 6 October 2026.

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