Mithra

The Mystica Encyclopedia · All entries · Rewritten September 2026

Mithra at a glance

Indo-Iranian Origins

Mithra's name derives from a Proto-Indo-Iranian word for a binding agreement. His Vedic counterpart, Mitra, is usually invoked together with Varuna in the Rigveda as a guardian of cosmic and social order. The earliest recorded mention is in a 14th-century BCE treaty between the Hittite king Suppiluliuma I and the Mitanni king Shattiwaza, which calls upon Mitra, Varuna, Indra and the Nasatyas as divine witnesses. Encyclopaedia Iranica notes that the Iranian Mithra acquired martial qualities largely absent from the Vedic Mitra, while both remained gods of alliance and obligation. The shared name and function show that a god of the binding agreement was already worshipped before the ancestors of the Indo-Aryans and Iranians separated.

Mithra in Zoroastrianism

Mithra is not named in the Gathas of Zoroaster, and scholars debate what this silence means. In the Younger Avesta, however, he is a major yazata. The Mihr Yasht (Yasht 10), the longest and one of the best preserved of the hymns, opens with Ahura Mazda declaring that he created Mithra to be as worthy of worship as himself. Mithra has a thousand ears and ten thousand eyes, never sleeps, and cannot be deceived. He rides a chariot across the sky before the sun, blesses those who keep their word, and punishes the "Mithra-deceiver" (mithro-druj), the breaker of contracts, a clear expression of the struggle between Asha and Druj.

In later tradition Mithra sits with Rashnu, the yazata of justice, and Sraosha to judge souls at the Chinvat Bridge after death. He is also associated with fire, and the Zoroastrian fire temple is still called Dar-e Mehr, "court of Mithra" (see temple fire).

Worship and Festivals

In the Zoroastrian calendar the sixteenth day of each month and the seventh month are dedicated to Mithra. When the day and month names coincide, Zoroastrians celebrate Mehregan, a joyful autumn festival of thanksgiving with roots in antiquity. It is still observed by Zoroastrians and, in cultural form, by many Iranians. Achaemenid royal inscriptions of Artaxerxes II and Artaxerxes III invoke Mithra alongside Ahuramazda and Anahita, showing his importance to the Persian monarchy. His name also lives on in many Iranian personal names, such as Mehrdad.

Attributes and Imagery

The Avestan hymns give Mithra vivid attributes. He is lord of wide pastures, who grants cattle and prosperity to the faithful. He watches from the high mountain Hara, surveying the lands of the Aryans before the sun rises, and he drives a chariot drawn by white horses. He carries a mace and is accompanied by other yazatas, including Rashnu, the goddess of reward Ashi, and personified Victory. His vigilance applies to agreements of every kind, from those between friends and spouses to those between nations, and his hymn lists the varying strength of contracts. Because he watches over truthfulness, Mithra was often invoked in oaths, and Iranian tradition associated the ordeal and legal testimony with his presence. In later Persian literature mehr also came to mean love, friendship and the sun.

Mithra and the Roman Mithras

From the late 1st century CE, a mystery cult of Mithras spread across the Roman Empire, especially among soldiers. Its underground temples (mithraea) show the god slaying a bull, a scene with no clear counterpart in Iranian sources. The Belgian scholar Franz Cumont argued in the late 19th century that the Roman cult was essentially Iranian religion transplanted west. Since the early 1970s most scholars have emphasized the differences, viewing Roman Mithraism as largely a new creation that borrowed an Iranian name and some imagery. The precise degree of continuity remains debated. The Roman god also shared the epithet Invictus with the sun god; see Constantine and Sol Invictus.

Legacy

Mithra also appears in Manichaean texts and in the religious landscape of Central Asia and the Kushan empire, where the sun god Miiro appears on coins. Popular writing sometimes claims that Christianity copied a "Mithras myth" of a virgin birth on December 25; historians regard these parallels as greatly exaggerated or unsupported by the ancient evidence. For Zoroastrians, Mithra remains a living object of devotion, invoked in daily prayers as the guardian of truthfulness and faithful agreements.

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