The history of Jerusalem during the Early Muslim period covers the period between the capture of the city from the Byzantines by the Arab Muslim armies of the nascent Caliphate in 637–638 CE, and its conquest by the European Catholic armies of the First Crusade in 1099. Throughout this period, Jerusalem remained a largely Christian city with smaller Muslim and Jewish communities. It was successively part of several Muslim states, beginning with the Rashidun caliphs of Medina, the Umayyads of Syria, the Abbasids of Baghdad and their nominal Turkish vassals in Egypt, and the Fatimid caliphs of Cairo, who struggled over it with the Turkic Seljuks and different other regional powers, only to finally lose it to the Crusaders.