The Umayyad Caliphate or Umayyad Empire was the second caliphate established after the death of the Islamic prophet Muhammad and was ruled by the Umayyad dynasty. Uthman ibn Affan, the third of the Rashidun caliphs, was also a member of the clan. The family established dynastic, hereditary rule with Mu'awiya I, the long-time governor of Greater Syria, who became caliph after the end of the First Fitna in 661. After Mu'awiya's death in 680, conflicts over the succession resulted in the Second Fitna, and power eventually fell to Marwan I, from another branch of the clan. Syria remained the Umayyads' main power base thereafter, with Damascus as their capital.
Arab-Sasanian-style Umayyad coin minted under Mu'awiya I rule in Basra in 675/76 in the name of the Umayyad governor Ubayd Allah ibn Ziyad. The latter's governorship later spanned all of the eastern caliphate. His father Ziyad ibn Abihi was adopted as a half-brother by Mu'awiya I, who made him his practical viceroy over the eastern caliphate.
Abd al-Malik introduced an independent Islamic currency, the gold dinar, in 693, which originally depicted a human figure, likely the caliph, as shown in this coin minted in 695. In 697, the figural depictions were replaced solely by Qur'anic and other Islamic inscriptions
The expansion of the Muslim Caliphate until 750, from William R. Shepherd's Historical Atlas. Muslim state at the death of Muhammad Expansion under the Rashidun Caliphate Expansion under the Umayyad Caliphate Byzantine Empire
A 14th-century illustration of the siege of Constantinople
The early Muslim conquests or early Islamic conquests, also known as the Arab conquests, were initiated in the 7th century by Muhammad, the founder of Islam. He established a new unified polity in Arabia that expanded rapidly under the Rashidun Caliphate and the Umayyad Caliphate, culminating in Muslim rule being established on three continents over the next century. According to Scottish historian James Buchan: "In speed and extent, the first Arab conquests were matched only by those of Alexander the Great, and they were more lasting."
Arab cavalry pursue fleeing Byzantines
Sasanian weaponry, 7th century
Bilingual Latin-Arabic dinar minted in Iberia AH 98 (716/7 AD)
Byzantine manuscript illustration showing Greek fire in action