Dumbarton Oaks (Main Building)

From http://www.doaks.org/:

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.