Allegheny County, Pittsburgh, Pa., Industry: Heinz Dome, New York World's Fair
postcard, 5 1/2 in. x 3 1/2 in.; This collection of approximately 29,000 postcards from the 1880s to the 1970s includes images from across the U.S. and all 67 Pennsylvania counties and highlights cities, towns, buildings, local businesses and industries, parks, and scenic and street views. Additional images include business and industry advertising, highways, states, and foreign countries. Disclaimer: This is a postcard of the Heinz Dome at the New York World's Fair, but is filed in Allegheny County because of its connection to the H.J. Heinz Company.