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Produced by the Harvard Graduate School of Design and accessible the Library of Congress's American Memory Project, this collection of approximately 2,800 lantern slides represents an historical view of American buildings and landscapes built during the period 1850-1920.
"Contains nearly 100 collections documenting the built and landscaped environment. These records span a century, 1890-1990, and contain primary source materials such as correspondence, reports, specifications, drawings, photographs, and artifacts".