Dumbarton Oaks

In 1944, it was the site of the Dumbarton Oaks Conference, which developed plans for the founding of the United Nations following World War II. 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. Provided by Wikipedia