eris
King
I find a Great Artist to be a useful part of my war machine, especially if I am collecting Vassals. I go into a new victim civ, take out enough cities to make them beg for mercy and capitulate, and then check culture borders. It often happens that there is a city that is particularly choked by opponent culture. A Great Artist can help that situation very nicely. The borders may not move back immediately if there is a whole lot of opposing culture, but with some culture being produced by the city itself somehow, the Great Artist will make a big difference sooner or later, usually sooner. It can be especially useful in one of those cities that is caught in the cultural crossfire between a couple of your allies. It can sometimes lead to the acquisition of some resource you really really wanted and wanted soon.