Rules are simple. If the church name is Liberty Christian Church, Smalltown, Licking County, Ohio, you create a category: [[Category: Liberty Christian Church, Smalltown, Ohio]] (without the county name). If you have more than a two paragraph writeup about the church, you can create a free space profile to accompany it. You can then place the Category on the profiles of people associated with Liberty Christian Church.
Where categorization is taking a look right now is what category this church category should be nested under, because you really need to know that when you're creating it. So probably nest it in [[Category: Licking County, Ohio, Religious Institutions]]. If that doesn't exist, you nest it under [[Category: Ohio Religious Institutions]], and that under United States Religious Institutions]]. That's where collaboration is good, because if you get the first one well grounded in the structure, the rest of them are easy.