I play on the 3rd hardest difficulty. I'm trying to integrate religion in my plans for the games. At the moment I am at the level of "Uuh, a Great Prophet... Spread it to a few city states and big civ cities. Then they are mine!" But it disappears. It seems to be momentarily. I read the 10 tile religion spread radius... How does it work? I have a city which generates 2 faith. 8 tiles to the right I make a new city with no +faith. How do this city get converted? Then further to the right, 7 tiles from my new city, is another civilization. They have their own +faith buildings. How does this work? How do I attain 2 religions in one city? How long does it take to convert a city? How do I spread it to another civ city further inside their territorry? More than 10 tiles away from my city, what spreads my religion and not his?