Oh good, then you can list the other denominations that existed besides "Catholic" when the bible canon was closed.
You need to dust off the old history books and recall that there were power struggles very early on between the church in Alexandria, the church in Rome, and the eastern church, which included places like Syria and modern-day Israel. One could make a very good historical argument that if Alexandria hadn't been sacked, it would have ended up as the center of the Christian church instead of Rome.