"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).

Theophilus P. Chandler (1845-1928) was an architect, artist and professor. He designed churches, houses and bridges, trainstations and other structures, such as the bear pits at the Philadelphia Zoo. He married Sophie M. du Pont (1851-1931), daughter of Henry du Pont (1812-1889) and Louisa Gerhard (1816-1900), in March 1873. The collection consists of 4 wash drawings of various scenes at Eleutherian Mills, then the residence of Henry du Pont (1812-1889).