Church (building)
The following description is about Roman Catholic churches, although some parts are the same in Episcopalian and Lutheran churches. Depending on the number of people that are in a community, the churches come in different sizes. Small churches are called chapels. The churches in a particular geographical area form a group called the diocese.  Each diocese has a cathedral.  In most cases, the cathedral is a very big church. Cathedrals are the seat of bishops.