Dumbarton Oaks, formally the Dumbarton Oaks Research Library and Collection, is a historic estate in the Georgetown neighborhood of Washington, D.C. It was the residence and gardens of wealthy U.S. diplomat Robert Woods Bliss and his wife Mildred Barnes Bliss. The estate was founded by the Bliss couple, who gave the home and gardens to Harvard University in 1940. In 1944, it was the site of the Dumbarton Oaks Conference to plan for the post-WWII United Nations. The part of the landscaped portion of the estate that was designed as an enhanced "natural" area, was given to the National Park Service and is now Dumbarton Oaks Park.
The research institute that has emerged from the bequest to Harvard is dedicated to supporting scholarship in the fields of Byzantine and Pre-Columbian studies, as well as garden design and landscape architecture through its research fellowships, meetings, exhibitions, and publications. It also opens its garden and museum collections to the public, and hosts public lectures and a concert series. Dumbarton Oaks is distinct from Dumbarton House, a Federal Style historic house museum also located in the Georgetown area.