In reading the meta discussion about what logo should be used for Christianity.SE, I got to wondering what symbols are unique to various denominations. Note: I'm not looking for symbols which are common across Christianity -- such as the Cross -- but which are more narrowly focused.
For example, the following symbols are -- as far as I know -- uniquely Catholic:
An example of a symbol which I think is denominationally unique (and I think is Episcopal) is this:
What other denominationally unique symbols are there?