Umayyad Caliphate
When Ali was assassinated in 661, Muawiyah marched to Kufa. There he persuaded a number of Ali's supporters to accept him as caliph instead of Ali's son, Hasan. Then he moved the capital of the caliphate to Damascus. Syria would remain the base of Umayyad power until they established an emirate in Cordoba, which also became a world centre of science, medicine, philosophy and invention during the Islamic Golden Age.