The fall of the Western Roman Empire in 476 AD led to the rise of new powers, including the Islamic Empire. Islam originated in the 7th century in Arabia, founded by the prophet Muhammad who received revelations that became the Quran. He spread Islam from Mecca to Medina, and after his death the religion continued expanding under successive caliphates. The Umayyad Caliphate established the capital in Damascus and expanded the empire from Persia to Spain. The Abbasid Caliphate moved the capital to Baghdad and some territories became independent. The Ottoman Turks rose to power in the 13th century and conquered the Byzantine Empire, with their empire lasting into the 20th century. Islamic civilization was based