That's the issue I have. There was no such thing as a 'ban' in medieval times, not to mention a ban is a more general term for being barred from a particular institution. In fact, the correct historical and linguistic context would in fact reverse the effects of exile and ban upon each other, exile returning to its all-encompassing removal of right and power while ban becomes the more temporary and less-powerful variety.
Ah, language... My love.
