Hehe, no great empire ever won ANY of other victories as well . Why not, still it's the victory. You must be missing a point of what a victory in Civ4 is. Victory here = achieved goal of some kind. The only ultimate victory is Conquest, any other can be argued as well. I.e. in religious victory other countries still can think that you do it wrong and beat you. A split of roman church is a living example. So it's O.K.