So I'm trying to play von Wittelsbach house, trying to grab the duchy of Bavaria. If I recall correctly if you had a certain amount of territory in the de jure duchy, you could usurp it. All I can see now is a claim button. But the pope wont grant it because of positive view of Duke. In the marriage game, the duke wont even consider a marriage to any female relatives to any of my male relatives, unless it is matrilineal. I've not really played this game since the Rajas of India DLC, so I'm pretty green now with all these changes to the game. Anyone got any ideas?