Part of it is to see if they can coordinate against Norman conquerors on the Italian Peninsula, but part of it is also to make clear what Pope Leo IX believes, that, hey, you have no right to criticize us about this unleavened bread. You don't have authority over us. I am the Pope in Rome. 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.