I was thinking about a religious country like watican. It could be located in the biggest city with have a specific religion, but i havn't figure aut how this city would be placed.

Interesujące :)
What kind of bonuses would it give? Maybe additional gold (from pilgrims)? But there is already a building built by prophet which is doing it, so maybe something else?

It could give you the ability to raze enemy holy shrines without incuring a negative modifier and give your CIV the effect of a 10% increase in the cultural slider for each shrine you raze. The Vatican was/is known for its history of holy wars.