Islamic time line By hilljac@bfschools.org 570 Muhammad born in Mecca 610 The religion Islam begins 622 Muhammad and followers move 630 Muhammad returns to Mecca 632 Muhammad dies Bakr succeeds 634 Umar becomes second Caliph 644 Uthman becomes third Caliph 656 Talib becomes fourth Caliph 661 Umayyad Caliphate takes control 680 son of Ali killed 692 The Dome Rock completed 711 the Muslims enter Spain 732 Islamic army in France 750 The Abbasid takes control 780 Mathematician al-Khwarizmi is born 972 Al-Azhar University is founded. 1025 Sina completes encyclopedia medicine 1048 Famous poet Khayyam born. 1099 Christian armies recapture Jerusalem 1187 Saladin takes Jerusalem back 1258 Mongol army sacks Baghdad