Mithraism
Mithra
The worship of the Indo-Iranian god of light Mithra (in Sanskrit Mitra). The religion originated in Persia from where it spread to Asia minor and then to Rome and much of the Roman empire. It was the chief rival to Christianity. The Avestan hymns, particularly in Yasht, depict Mithra as the god of heavenly light, all-seeing, protector of the virtuous in this world and the next and, most importantly, the foe of the powers of evil and darkness.