Philadelphia Architects and Buildings
The Athenaeum of Philadelphia provides a database which can be searched by architect, project, location or archival collection, or browsed by street.
Philadelphia City Hall
A history and virtual tour of this monument designed in 1871 by John McArthur in French Second-Empire style.
Philadelphia Historic Landmarks
Colesanti and Associates present images of fourteen of the city's architectural highlights, each with a summary of its features and history.