Founded to educate the children of Wilmington's elites, Tower Hill School occupies a neighborhood once thick with du Pont family mansions (see St. Amour,
CH23
). Irénée du Pont and his cousins established the school, construction of which cost more than twice the $300,000 estimate. It was the most important early commission of Brown and Whiteside. A rendering of the Colonial Revival facade survives by Reah de B. Robinson, chief draftsman for the firm, and construction by DuPont Engineering Company was recorded in a series of photographs. In his 1970s design for the Library-Science Building, architect Anderson recalls being influenced by “the brick structures, concrete frames, and waffle slabs” popularized by The Architects Collaborative in Cambridge, Massachusetts. The main building was renovated by a Wilmington firm, Kelly and Johnson Architects, in 1999–2002.