I founded Christianity in my capitol in 25292 BC with a Great Prophet. In about 5000 BC I got another Great Prophet and tried to use it to build the Cathedral of ??? with it there and noticed that I do not have a holy city for Christianity in Rome or anywhere else. Would someone please explain this to me and tell me what needs to happen for a holy city to manifest? I did look in the Civilopedia and I did a serach on the forum but found no help.