Some of the Barbarian temples are interchangable and some of the African temples. Also is the same with the Greek/Roman cultures.


Heres how culture penalty works and was mentioned by Jerome(CA) and I'll elaborate a little more.

The governors palace building has the hugest effect and if your Roman you'll notice as soon as you upgrade the governors building, the town will change style and same with other cultures. If all the buildings are of your culture except for the governors building there seems to a be a minumum of 20 percent culture penalty no matter what.

Any building you build of your culture will reduce the culture penalty, even rodes and city wall upgrades will counter the culture penalty. So when I take a town if it will not be expanding soon and there are no other buidings to build I start razing buildings and replacing them to reduce the culture penalty.

So when you run across that really nice temple you want to keep you can reduce the culture penalty to zero but will only occur once you have built enough of your own cultures buildings to reduce that effect.