In the Merchant Marine, UHT milk is called “Paul Hall Milk”.
Paul Hall was President of the Seafarer’s International Union. He lasted forever in the position. Hence, a synonym for anything well preserved by artificial means past its prime.
I believe he is making a distinction between Christianity and Christendom. Through Constantine’s conversion, Christinity began to assume a political and territorial aspect, ie “Christendom”.
“Just got back from a business trip to Houston. No offense, Houstonites, but what an armpit! It has all the traffic of Los Angeles with none of the attractiveness.”
Count me as offended. Also, it is properly Houstonian.