Islam is one of the monotheistic Abrahamic religions along with Christianity, and Judaism. Islam first gained prominence during the 7th century C.E. and is the second largest religious group in the world behind Christianity. A follower of Islam is known as a Muslim.
On one hand I've read that Shi'a Islam was the only religion allowed in the Safavid empire. On the other hand, the empire contained parts of Armenia and Georgia, but Armenians and Georgians are ...