Muhammad was a caravan trader in Mecca who began receiving revelations from the Angel Gabriel in 610 and founded Islam. He rejected by Mecca but accepted in Medina, where he established the first Muslim city. He later conquered Mecca in 632 before his death. Islam's core beliefs include submission to Allah, prayer five times a day facing Mecca, alms giving, fasting during Ramadan, and pilgrimage to Mecca.