I watched a documentary about the Berghof residence of Hitler and they mention that the U.S confiscated underground archives of Hitler, but not what happened to everything. What happened to all of those personal items? I imagine they would be fascinating to see.
I wrote a much longer response on Allied souvenir seeking and looting, but a portion of it does deal with this so it might be of interest to you, with some discussion on the property of Hitler and other Nazi officials and what happened to it.