What symbols are unique to the various denominations?

Question

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:

Chi Rho Holy Name Monogram "M" for Mary

An example of a symbol which I think is denominationally unique (and I think is Episcopal) is this:

Shield

What other denominationally unique symbols are there?

This is an interesting question but could result in an endless list of logos and emblems of different denominations and national/international church groups. We'd need to consider how to avoid that.
I meant to make this a community wiki question as there isn't, by definition, a single answer yet there can be lots of very good ones... but I don't seem to have the ability to do that. Do I need a higher rep score? Can an admin make the change?
@Audio only mods can do that since the great "Should be CW" edict of 2010. But it's up to them to make an exception to the "no list" rule.
I've seen the first one (Chi Rho) in several Lutheran churches here in Norway, so I don't think that one's exclusively Catholic. Also, see Christian symbolism.
Okay, it makes sense that the Chi Rho isn't only Catholic: it's a symbol that goes back to antiquity as those are the first two letters of "Christ" in Greek. I am accustomed to seeing that as a symbol referring to a Catholic priest. The IHS monogram was invented with advent of the Society of the Holy Name whose aim was to combat blasphemy... I thought that was post-reformation but maybe it wasn't... or maybe it was a crossover symbol?

Affable Geek · Answer 1 · 2012-02-03 00:31:23Z

The Chi-Ro symbol dates back to 312 AD when Constantine had a vision, and was told to fight under that symbol at the Battle of Milvan Bridge. It is truly "catholic" in the sense that it is universal to all of Christianity. [You may have heard of a city in Egypt that the Copts named after this symbol ;) ]

IHS is also fairly common- I've seen that in Baptist churches and Anglican ones. I believe that is supposed to be the Greek form of Jesus but I don't know. (maybe someone should ask!)

The last one is just a coat of arms for The Episcopal Church, much like the emblem of the Holy See.

IHS is Latin, isn't it? Jesus Saviour of Men (where L. homo is gender-neutral, but is traditionally translated into E. as man, which used to be gender-neutral but no longer is).