PANTHEON came from the Greek Word 'pan' means all, 'theos' means god and/or 'theion' meaning holy. Is means a group of people who are respected, famous and important people; a group of god or religion collective.
PICK OUT simply means choosing or distinguishing out a particular thing, out of its group or among the members of its group.
BUT is from the Old English words be-ūtan, būtan, būta which means ‘outside, without, except’. It is use to indicate a phrase that is contrast to the first given phrase.
FOOTING THE BILL simply means paying for something, settling the account, and/or responsible for paying the cost of something.