One, it was founded in 1966 by Anton LaVey; after he passed, it was ran by Blanche Barton until 2002; then Peter H. Gilmore which he still currently runs it.
Not enough to be a threat, and enough to be important. There really is no way of knowing, since people who join the Church of Satan are members for life (unless they send an e-mail to the Church of...
Well there is only one Catholic Church, but there are different types of Catholic churches such as the eastern rites. They use icons(pictures) instead of statues and have the gated altar and speak...