Dancing Hoskuld
Deity
And with Rev on?
Increased revolutionary sentiment for cities with religions other than the state religion, Free Religion civic mitigates this some what. Huge revolution sentiment for founding a non-state religion and having a holy shrine of a non-state religion in a city.
However I play with revolutions on and try and get all the religions. It can get interesting but garrisoning helps, as does keeping your economy under control and building those forbidden palace style buildings in the right spot. In my last few games most religions have been founded in the same city!