The major garden work was completed between 1921 and 1941.
Description
"The Dumbarton Oaks Research Library and Collection is an international center for scholarship, providing resources for study and publishing scholarly works in Byzantine, Pre-Columbian, and Garden and Landscape Architecture Studies. Begun as a private collection by Mildred and Robert Woods Bliss in 1920, and given to Harvard University in 1940, the library and collections are now a world-class treasure, with art objects, artifacts, manuscripts, and rare books." -- http://www.doaks.org/