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So the last Grand Master of the Teutonic Order prior to Albrecht of Brandenburg-Ansbach was Friedrich of Saxony.
Let's say he doesn't die in 1510 and rather live until the 1540's. He does the same as Albrecht and secularize the Order and creaty the treaty of Krakau.
So what happens when he dies (childless lie OTL)? His brother Heinrich would probably inherit Prussia. But after that?
Heinrich had three sons so the Wettins might split up their lands again. Or would they create a united Saxony-Prussia? Could this be as powerfull as OTL? Would this change House Wettins behaviour?