
Originally Posted by
Zeleny drak
Foreign buildings, unlike EB1, don't seem to have any negative effect, as far as I noticed. All the unrest is coming from culture. The major exception are the buildings that change culture (like military colonies). You can use the buildings as they would be your one, so you can upgrade them. You can even you use the temples for gods that you don't have. For example the lusitans don't have a temple giving law bonuses but you will get the law bonus if there is a temple build by others. So you don't need to destroy these buildings
Other's culture allied state buildings work the same for you. That's why they are not destroyed automatically when you occupy the city.