What Building did Harry Houdini actually do his hanging straight jacket act from In Pittsburgh ?

Yes the famous Harry Houdini came thru Pittsburgh several times in his career  he jumped off the old 6th street bridge in shackles   and even did his famous Straight Jacket escape while hanging upside down from a building  in downtown Pittsburgh  but which building because even the article in the Post Gazette is not clear which one.

http://www.post-gazette.com/opinion/Op-Ed/2009/03/22/The-Next-Page-Harry-Houdini-and-Pittsburgh-the-ties-that-bind/stories/200903220183

Was it the newspapers building or the building across the street from it.  No one seems to really know because different pictures of the time show different buildings in the background

Typical Straight Jacket Escape

 To make matters worse his brother who appeared as the Great Harden also did the trick at the time so
accounts of who did what often got confused .
So we know both where here and both did the trick but from what buildings?