Zoroastrianism in Azerbaijan of the world`s oldest religions Zoroastrianism was also practiced in the territory of Azerbaijan in ancient times. Zoroastrianism, sharing its name with its founder Iranian prophet Zoroaster (also known as Zarathustra), was the first monotheistic belief in the world and the official religion in Persia from 600 BCE to 650 CE. Zoroastrians believed that a god called Ahura Mazda (Wise Lord) created the universe. Sacred book of Zoroastrianism Avesta consists of two main sections: the oldest section contains the Gathas including seventeen hymns and the younger Avesta containing commentaries to the older one. It also includes myths, stories and details
Medes of the Indo-Iranian word "arta-" (lit. "truth") which is familiar from both Avestan and Old Persian and also examples of theophoric names containing "Maždakku" and also the name "Ahura Mazdā". Scholars disagree whether these are indications of Zoroastrian religion amongst the Medes. Diakonoff believes that "Astyages and perhaps even Cyaxares had already embraced a religion derived from the teachings of Zoroaster" which was not identical with doctrine of Zarathustra and Mary Boyce believes that "the existence of the Magi in Media with their own traditions and forms of worship was an obstacle to Zoroastrian proselytizing there". Boyce wrote that the