Father Pitt has created a spreadsheet of information about buildings in Pittsburgh and their architects, and he offers it without warranty of any kind to the world at large. If you click on this link, you will be taken to the spreadsheet in Zoho Office:
Father Pitt’s Great Big List of Buildings and Architects
On line the file can’t be edited by anyone but Father Pitt, but you can download it in Open Office, Excel, and other common formats, and sort it and format it any way you like.
The file incorporates both original research and some data from a City of Pittsburgh historic-buildings survey, which Father Pitt adopts with gratidude. For that reason some information is duplicated. The City of Pittsburgh should not be held responsible for any inaccuracies in the Great Big List; those are old Pa Pitt’s fault.