Origins of Electronic Media, 1910–1922." Technology and culture''' 51.4 (2010): 809-828 online. Arrigale, Lawrence M., and Thomas H. Keels. Philadelphia's Golden Age of Retail (Arcadia Publishing, 2012). Ershkowitz, Herbert. John Wanamaker: Philadelphia Merchant (Signpost Biographies-Da Capo Press, 1999) Kirk, Nicole C. Wanamaker's Temple: The Business of Religion in an Iconic Department Store (NYU Press, 2018). Robert Sobel The Entrepreneurs: Explorations Within the American Business Tradition'' (Weybright & Talley 1974), chapter 3, John Wanamaker: The Triumph of Content Over Form External links Friends of the Wanamaker Organ The John Wanamaker Collection, 1827-1987, including an extensive collection of correspondence, accounts, scrapbooks, legal papers, photographs and other materials which detail the history of Wanamaker's store, is available for research use at the Historical Society of Pennsylvania. American companies established in 1861 Retail companies established in 1861 Retail companies disestablished in 1996 Defunct department stores based in Philadelphia Historic American Buildings Survey in Philadelphia History of Philadelphia National Historic Landmarks in Pennsylvania Commercial buildings completed in 1902 Market East, Philadelphia 1861 establishments in Pennsylvania National Register of Historic Places in Philadelphia May Department Stores Wanamaker family