What is the collective noun for people collected at a religious place?

There isn't a single, universally accepted collective noun for people gathered at a religious place.

However, you could use terms like:

* Congregation: This is the most common and general term, referring to a group of people assembled for religious worship.

* Assembly: A more formal term, emphasizing the gathering of people for a specific purpose, like a religious service.

* Faithful: This term emphasizes the shared belief system of the group.

* Followers: This term is often used for those who follow a particular religious leader or tradition.

* Devotees: This term emphasizes the deep commitment and devotion of the group.

* Worshipers: This term focuses on the act of worship itself.

The best term to use will depend on the specific context and the type of religious gathering.