This episode explores the rise of the Abbasid Caliphate and the founding of Baghdad. Against the backdrop of the declining Umayyad Caliphate, marked by internal strife and rebellions in regions like Khorasan, a new power emerged—the Abbasids, descendants of the Prophet Muhammad's uncle. More significantly, the Abbasid revolution, fueled by a fusion of Zoroastrian and Islamic beliefs, was spearheaded by the enigmatic Abu Muslim, whose mysterious origins and charisma mobilized both Muslims and Zoroastrians. The Abbasids' strategic use of this cross-cultural appeal led to their swift victory over the Umayyads, culminating in the brutal extermination of the Umayyad dynasty and the ascension of Al-Mansur, known for his piety and ruthlessness. For instance, Al-Mansur's decision to build Baghdad, a circular city designed by Persian architects, symbolized a shift in Islamic power dynamics, turning away from the Roman West and towards the East. The city's strategic location and impressive architecture quickly established it as a global center of trade, culture, and learning, reflecting the Abbasid Caliphate's ambition to create a new era of Islamic dominance. This episode highlights the complex interplay of religious, political, and cultural forces that shaped the early Islamic world and the lasting legacy of Baghdad as a crossroads of civilizations.