The Philadelphia on Stone Digital Catalog contains over 1300 lithographs, related ephemera, and prints documenting Philadelphia commercial lithography between 1828 and 1878 derived from the surveys conducted at eight collaborating institutions between May 2007 and May 2010. Lithographs listed in Nicholas Wainwright’s Philadelphia in the Romantic Age of Lithography (1958), lithographs not listed in Wainwright portraying the built environment of Philadelphia, and advertisements for and printed views of Philadelphia lithographic establishments form the core content of the records and images contained in this catalog.