Quote Originally Posted by Chris1959
If a temple can be upgraded as a setlement grows I'll usually upgrade if not destroy and build a fresh. I'm pretty certain apart from the govt building a temple has the biggest cultural penalty, which can hurt a lot as that plundered cities pop recovers.
exactly - the upgrade should reduce the culture penalty as the new upgraded temple is converted to one of your own faction. leaving it will continue to penalise you due to the culture, and destroying it will sacrifice the bonuses it offers.