The Weinberg Memorial Library now provides access to the digital archive of the Philadelphia Inquirer and also the Pittsburgh Post-Gazette via ProQuest Historical Newspapers. Below are links to these two digital archives as well as coverage details:
Philadelphia Inquirer (Current coverage includes 1860-2001, forthcoming in 2017 the paper will span 1829-2009) – http://search.proquest.com/hnpphiladelphiainquirer
Pittsburgh Post-Gazette (Current coverage includes 1786-2003, forthcoming in 2017 the paper will span 1768-2008) – http://search.proquest.com/hnppittsburghpostgazette
The Philadelphia Inquirer is a morning daily newspaper that services the greater Philadelphia metropolitan area. It was founded in 1829 by John R. Walker and John Norvell, and is the third oldest surviving newspaper in the United States. The Inquirer has the eighteenth largest average weekly newspaper circulation in the country. Throughout its history, the Philadelphia Inquirer has won 19 Pulitzer prizes.
The Pittsburgh Post-Gazette is the largest daily newspaper serving the Pittsburgh metropolitan area. It was first printed in 1786 and has gone through several name changes in its publication history. The Pittsburgh Post-Gazette has won six Pulitzer prizes since 1938.