Founded in the Arabian peninsula in the 7th century AD, Islam is now the professed faith of nearly a billion people worldwide, particularly in North Africa, the Middle East, and parts of Asia. The ritual observances and moral code of Islam were said to have been given to Muhammad as a series of revelations, which were codified in the Koran. Islam is regarded by its adherents as the last of the revealed religions, and Muhammad is seen as the last of the prophets, building on and perfecting the examples and teachings of Abraham, Moses, and Jesus. There are two major branches in Islam, Sunni and Shia.