There is a basic levy that everyone gets, but buildings of the wrong culture are automatically destroyed under certain conditions.Is the levy type connected to the building, the province culture, or the holder? If a mongol horde ends up conquering syria, will the buildings change to mongol instantly? Or will the mongols suddenly end up with arab-style armies instead of horse archers? If so, how do you change it to your own type of levy?
If I go crusadin' and grab a mongol province (perhaps one of the syrian ones I mentioned), will I suddenly be able to field a horse archer army?