There are 66 National Historic Landmarks (as of 2011-01-01) in Philadelphia. Many are related to the American Revolution and early Federal Period, but others relate to Germantown, and to all sorts of architecture, including modern.
This category has the following 9 subcategories, out of 9 total.
Media in category "National Historic Landmarks in Philadelphia"
The following 9 files are in this category, out of 9 total.