I have the seat of Peter, first amongst apostles. And the leader of the delegation is a particularly proud and principled individual. When they go to Constantinople, Patriarch Serularius doesn't even meet them, essentially is rebuffing their demands. And so because of that, that delegation decides to excommunicate Serularius, the Patriarch of Constantinople, the leader of what is now the most important church in the East. Remember, the other significant centers of Christianity are now under Muslim rule. Well, in retaliation to that, Patriarch Serularius says, hey, you can't excommunicate me. In fact, I'm going to excommunicate you.