Pierre A. Gentieu (1842-1930) was a long-time employee of E.I. du Pont de Nemours & Company. Gentieu was born in France in 1842. He emigrated to the United States around 1859. He began working for DuPont in 1877. This collection is comprised of images taken by DuPont Company employee Pierre Gentieu from approximately 1880 to 1920. Gentieu's images document the DuPont Company Powder Yards along the banks of the Brandywine River in Wilmington Delaware. The collection documents the surrounding community along the Brandywine including worker's families, du Pont family homes, churches in the area, DuPont Company exposition displays, and other facets of social and work life in the area.