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
Zoroaster 330 BCE. The Seleucid rulers who gained power following Alexander's death instituted an "Age of Alexander" as the new calendrical epoch. This did not appeal to the Zoroastrian priesthood who then attempted to establish an "Age of Zoroaster". To do so, they needed to establish when Zoroaster had lived, which they accomplished by (erroneous, some even identified Cyrus with Vishtaspa) counting back the length of successive generations, until they concluded that Zoroaster must have lived "258 years before Alexander". This estimate then re-appeared in the 9th- to 12th-century Arabic and Pahlavi texts of Zoroastrian tradition, like the 10th century Al-Masudi