Umayyad Caliphate

The Umayyad Caliphate was the first hereditary dynasty of Islam and presided over the empire at its greatest territorial extent, making it one of the largest empires the world had yet seen.

It was founded in 661 CE by Mu'awiya I, governor of Syria, who emerged victorious from the First Fitna following the assassination of the caliph Ali, and who established his capital at Damascus and made the caliphate a hereditary monarchy within the Umayyad clan. Under the Umayyads the great Arab conquests resumed and reached their furthest limits: their armies swept across North Africa and crossed into the Iberian Peninsula in 711, conquering most of Spain and Portugal, while in the east they pushed through Central Asia toward the frontiers of China and into the Indus Valley of South Asia. At its height the empire stretched some five thousand miles from the Atlantic to the borders of India and China. The Umayyads transformed the caliphate from an Arab conquest-state into a more organised empire, undertaking crucial administrative reforms under Abd al-Malik ibn Marwan, who made Arabic the official language of government, introduced a distinctly Islamic gold and silver coinage, and reformed the tax system. This era also saw the construction of monumental Islamic architecture, including the Dome of the Rock in Jerusalem and the Great Mosque of Damascus. Despite these achievements, the regime rested on the dominance of an Arab Muslim aristocracy and was strained by deep tensions: non-Arab converts (mawali) resented their second-class fiscal and social status, the Shia and other factions disputed Umayyad legitimacy, and tribal rivalries divided the ruling elite. These grievances coalesced into the Abbasid Revolution, a movement that drew strength from disaffected groups especially in the eastern province of Khurasan. In 750 the Umayyad armies were defeated, the last caliph Marwan II was overthrown, and most of the dynasty was massacred. A surviving prince, Abd al-Rahman, escaped to Spain, where he founded an independent Umayyad emirate at Córdoba.

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