New Castle County, Delaware
The Hagley Museum and Library celebrates the landscape heritage of Delaware’s Brandywine Valley, interpreting and preserving historic industrial and post-industrial sites along the Brandywine River. The Crowninshield Garden, unique among Hagley’s cultural landscape heritage, is a ca. 1920s neoclassical garden built upon the terraced ruins of Eleutherian Mills––the first DuPont Company manufacturing site in the United States. Operating from 1803-1921, Eleutherian Mills was the foremost gunpowder production facility in America. The site was the foundation of a sprawling global chemical and business empire tied to the du Ponts, who rose to become one of the wealthiest families in the world by World War I.