Image:2005.jpg|John Hill, "''This Plan of the City of Philadelphia and Its Environs (shewing the improved parts)''," 1796.
Changes - History of Early American Landscape Design
A Project of the Center for Advanced Study in the Visual Arts, National Gallery of Art
History of Early American Landscape Design

Changes

[http://www.nga.gov/content/ngaweb/research/casva/research-projects.html A Project of the National Gallery of Art, Center for Advanced Study in the Visual Arts ]
A Project of the Center for Advanced Study in the Visual Arts

National Gallery of Art, Washington