Is there a a single specific word for a the group of people when they assist at Mass in a church?
Religious assembly (Ngram) is a common expression whose usage appears to have been decreasing in the last decades.
The term I am looking for may fit also to other religious contexts as long as it refers to people who gather for an official religious rite.
Synonyms like: convocation, ingathering, meeting, etc. do not sound appropriate.