Chapter House.

Why?

First, Kraxis says so, and it's like Simon Says...it's always right.

Second, we are here for war. Holy wars or not, what matters! Crusade away, babies!

Third, it feels like Medieval Total War, which feels like it is in a Monastery, with a certain bloodthirst, of course, which means our military campaigns going on in here.

And fourth, I like it.

Therefore, take my vote for Chapter House.