Richard Longstreth

[The Quadrangle Historic District] is an extraordinary ensemble of buildings and landscape, created over a period of nearly a century and a half, from 1846 to 1987. The nomination delineates the many facets of this complex that render it historically significant. Our research draws from a very substantial array of period documents – popular and professional journals, newspapers, and the extensive archives of the Smithsonian – from scholarly studies, and from a firsthand knowledge of architecture, landscape architecture, urbanism, and historic preservation projects across the United States and from many places abroad.