This museum turned out to not be part of the 1€ Sunday museums.  It is 4,50€ for adults but 3€ for students.  There are only 4-5 rooms to see in this white Baroque building.  It focuses on life in the Alps, primarily the Jewish community before-during-after the war, as well as the Nazi period.

I think it was worth 1€ but perhaps they need donations — for what, I know not.