A gathering of nuns is called a nunnery. Or a convent.
A large gathering of people is called a group, mob, crowd or a mass.
When a Christian reverts to Islam they are called Muslims ;)
No the sacred book of Islam is called The Holy Qur'an
People who follow the religion of Islam are called MUSLIMS.
Arkanal Islam
It is called a levee!
A clerical gathering is often referred to as a convocation, symposium, or conference.
There is nothing in Islam called Symbol.
The believers of Islam are called Muslims
Tango
A gathering