The du Pont family is a prominent Delawarean family descended from Pierre Samuel du Pont de Nemours (1739-1817), who founded E.I. du Pont de Nemours & Company with his son, Eleuthère Irénée du Pont (1771-1834), in 1802. E.I. du Pont de Nemours & Company is a chemical research and manufacturing company more commonly referred to as the DuPont Company. This collection consists of placemats with images of exterior views of eight du Pont family homes.

E. Paul du Pont (1887-1950), the son of Francis Gurney du Pont (1850-1905) and Elise Simons du Pont (1849-1919), is best known as the manufacturer of the Du Pont automobile. He owned the house Squirrel Run Hill, the former Second Office of E.I. du Pont de Nemours & Company, and the surrounding grounds. This small collection includes papers relating to additions and alterations to Squirrel Run Hill and papers relating to the estates of his parents.

Upper Louviers was a residence located on the east bank of the Brandywine Creek in Brandywine Hundred, Delaware, opposite the powder mills of E. I. du Pont de Nemours & Company. Elise du Pont Elrick (1902-1984), who lived at Upper Louviers as a child, was an architect and translator. This collection consists of architectural drawings of the residence made by Elise du Pont Elrick in 1936.

Maurice du Pont Lee (1885-1974) was the General Advisor to the Chief Engineer of E.I. du Pont de Nemours & Company. The collection includes photographs of Maurice du Pont Lee's family members. The collection also includes a group of public relations photographs of Maurice du Pont Lee, dating from 1950 to 1969.

"Rencourt" was the Wilmington, Delaware, home of Alexis Irénée du Pont (1843-1904) and his family. Pennsylvania architect Theophilus P. Chandler, Jr. (1845-1928) designed the house; it was built in 1890 and demolished in the 1950s. This collection includes plans of the main and second floors (ink on linen), plans and elevation of the stables (white-line blueprints), and plans of the gate (white-line blueprint).

T. Coleman (Thomas Coleman) du Pont (1863-1930) was President of the DuPont Company from 1902 to 1915, and a U.S. Senator from Delaware from 1921 to 1928. He married Alice du Pont (1863-1937) in 1891. The "Old Mill" was constructed in 1909 to 1910 as a weekend home for T. Coleman du Pont in an area near Greenville, Delaware. These photographs document the Old Mill, retreat of T. Coleman du Pont, and the surrounding gardens planted by his wife, Alice.

Andrew Gray Wilson (1844-1905) was well-known among shipbuilders as a preeminent marine engineer and naval architect. This small collection consists primarily of individual and group portraits and snapshots of the Wilson family and the family of one of the daughters, Natalie Wilson du Pont. The collection is organized into three series; family photographs; home interiors and exteriors; and family cars and dogs photographs.