Fervus has given me a quest to build a temple, which I want to do because I like Fervus' spells. I even have a holy ground open next to my city and a free pop with which to start construction.
But I'm not allowed to build a temple to Fervus. In fact, no such temple is visible in the building list. I can build a temple to Krolm, Lunron or Krypta. Temple to Dauros is greyed out. Where are the rest of the temples?