- Boyce, Zoroastrians, 1979, p. 1. "Zoroastrianism is the oldest of the revealed world-religions, and it has probably had more influence on mankind, directly and indirectly, than any other single faith." "Zoroastrianism: History, Beliefs, and Practices." Today, the Zoroastrian Trust Funds of Europe (ZTFE) remains the oldest established religious voluntary organisation in the UK of South Asian origin. Quest 91.1 (JANUARY - FEBRUARY 2003):4-9. ( transfers-film/Adobe Stock) In later times, Zoroastrianism would be the official religion of the Achaemenid, Parthian, and Sassanian Empires, all of which were centered in Persia. Zoroastrian Iran was finally defeated by the expansion of Islam, but for over 1,000 years Zoroastrianism was the official religion of three major world empires, making it, perhaps, the most powerful world religion of the time. The Zoroastrian Trust Funds of Europe in the United Kingdom has been established for over one hundred and fifty five years. The last Zoroastrian monarch was Yazedegird (d. 652 CE). The official religion in Iran for 1,000 years, its adherents are now a dwindling minority within the Islamic Republic. Zoroastrianism, although the smallest of the major religions of the world in the number of its adherents, is historically one of the most important. According to tradition, Zoroaster was 77 years old when he was murdered by a Turanian by the name of Bratrok-resh. Inside a Zoroastrian fire temple in Iran . By Dinshaw and Hutoxy Contractor.