Hello, I am having trouble find a primary resource on the history of Philadelphia City Hall.
If you can tell us a bit more about your project or assingment, that will help us to guide you.
Also, where have you been looking so far? Have you searched any resources/databases from the library's collection? If so, which ones have you been using?
One idea that occurs to me: have you searched the American Institute of Architects' (AIA) website for "Philadelphia" and "City Hall"?
Please note: We have walk-in reference hours until 7pm this evening if you would like to stop by.