"Historical Collections for the National Digital Library." A project of the Library of Congress.  Pre-1923 material is probably in the public domain.  Post-1923 material is probably under copyright.

Pre-1923 maps are probably in the public domain.  Post-1923 maps probably are not.

Pre-1923 material is probably in the public domain; post-1923 material is probably protected by copyright.

"Ongoing programs of the National Park Service have recorded America's built environment in multiformat surveys comprising more than 350,000 measured drawings, large-format photographs, and written histories for more than 35,000 historic structures and sites dating from Pre-Columbian times to the twentieth century." Search by place to limit results to Philadelphia.

Pre-1923 items and government documents in our collections are in the public domain.  Search Franklin to identify relevant material.

Digital copies of books digitized from major libraries around the world.  Books published before 1923 are in the public domain.

Historic ground plans and birds-eye perspective drawings of Philadelphia industrial sites.

Similar to Google Books.  Smaller but with higher quality images and some items not available elsewhere online.

Material relating to Philadelphia that has been digitized from Penn's collection. Includes the Journal of the Common Council, the Ordinances and assorted 19th century books about the city.

Making of America (MOA) is a digital library of primary sources in American social history from the antebellum period through reconstruction. The collection currently contains approximately 270 books and 100,000 journal articles with 19th century imprints.

Making of America (MOA) is a digital library of primary sources in American social history from the antebellum period through reconstruction.  The collection currently contains approximately 8,500 books and 50,000 journal articles with 19th century imprints.

Large collection of images.  Limit your search by using "Philadelphia" as a term.

Consult with the librarian to determine what can be reproduced and whether reproductions can be published.  Pre-1923 items are probably in the public domain, but restrictions might apply.

Includes the Philadelphia Press (1857-1865), the American Presbyterian (1860-1869), and the Daily Evening Bulletin (1864-1870).

The Geohistory Network includes scanned images of historic fire insurance atlases and directories for Philadelphia. It is a pilot project of the Philadelphia Area Consortium of Special Collections Libraries (PACSCL) to develop a web-based repository of geographically organized historical information about Philadelphia, its geography, its buildings, and its people.  Pre-1923 items are probably safe to use.

Images of pre-1923 item are probably safe to put on the Internet.  Photographs taken with a camera without a tripod or a flash are permitted.

Philadelphia Neighborhoods: Histories, Plans and Futures is a free, searchable database of neighborhood-based reports issued by the Philadelphia City Planning Commission between 1946 and 1990. The database was created by the University of Pennsylvania Libraries.

Photographic images of Philadelphia from the Philadelphia City Archives, which holds approximately 2 million photos dating from the late 1800s, as well as the Athenaeum of Philadelphia.

Guide Includes: Image sets: - Commercial Panoramas; Paintings, Watercolors, and Sketches; Engraved and Lithographed Views; Photographs; Measured drawings; Illustrations in Architectural Publications; Real Estate Atlases ; Holdings by Repository ; Integrated Prototypes; Textual Documents: - Full texts ; Research Tools ; Databases and other Searching Tools

You will need to consult with someone in the museum to determine whether photocopies can be made or photographs are allowed and whether restrictions apply. Here is a brief description of standard rules for camera use in museums.