Architect Alfred Victor du Pont was repeatedly frustrated in trying to get commissions for state projects, because, he thought, Pierre S. du Pont held an old grudge against his father, A. I. du Pont. This federal commission was highly welcome. The limestone portico consists of two big columns copied from the Tower of the Winds in Athens, Greece (50 BC), set in antis beneath a pediment. The walls are of Williamsburg-type bricks with limestone quoins, under a hipped roof with widow's walk and cupola. Inside is a work-relief mural by a Wilmington artist, Harvest Spring and Summer (1936, William D. White). The building was too small for its purpose and was supplanted in 1962 by the Colonial Revival post office nearby, which resembles a motel—the contrast demonstrating a striking postwar decline in the quality of public architecture.