Following the guidelines for creating religious institutions categories, I created a new category to add to Michael Faraday's profile, for t]]he Sandamanian Church of which he was a member in Islington, London. This new category was then made a subcategory both of [[Category: Religious Institutions, London]], and also of a new [[Category: Sandamanian (Glasite) Church]]. This category was in turn made a subcategory of [[Category: Christianity]] and the Wikipedia article was linked on this category page.
As a small church, now extinct, I saw no need to have any subcategories between the local congregation level and the denomination level.