If you have the
Inns and Cathedrals expansion, you get some tiles that are fully city and contain a church. These tiles make your city worth 3 points per tile/shield in the city, instead of just 2 (but 0 points if it is not complete at the end of the game).
Here is an example of a cathedral city that scores 36 points (3 x 12 tiles). This is 12 tiles and not 13 because you only count a tile once, even if it contains multiple parts of the city (as does the middle part which has two "caps" that connect the city together across the field).
