This mansion, now a museum, was once the home of Elias Baker. He owned iron mills and a large chunk of what is now Altoona. The story goes that his daughter, Anna, fell in love with one of the mill workers. The match was completely unacceptable to her father, who forbid the relationship to continue. Anna refused to marry anyone other than her true love and she died unmarried.
The historical society took over the mansion and turned it into a museum, and that's when the rumors of it being haunted started.