The Archives of American Gardens (known colloquially as AAG) is an archive dedicated to preserving documentation and content related to gardens in the United States. Established in 1992, the Archives are located in Washington, D.C., United States, and are maintained by Smithsonian Gardens, a unit of the Smithsonian Institution. As a research center, the Archives of American Gardens houses around 80,000 photographic images and records which pertain to over 6,350 gardens throughout the United States. Photographs and images date from the 1870s to the present and showcase garden features such as fountains, sculptures, fences and gates, parterres, and garden structures. The Archives also documents garden styles, such as large Italianate estates, herb and rose gardens, cottage and patio gardens, xeriscapes, and community gardens.