Gibraltar (previously known as the Hugh Rodney Sharp Mansion), located at 2505 Pennsylvania Avenue in Wilmington, Delaware, is a country estate home dating from c. 1844 that is listed on the National Register of Historic Places. It takes its name from the Rock of Gibraltar, alluding to the high rocky outcrop on which the house was built. It is located just inside Wilmington's city limits and originally stood at the center of a much larger estate which has over time been reduced to the present area of about a city block in size. The house was originally built by and inherited by his brother's wife and children, before being bought in 1909 by , who was linked to the Du Pont family through marriage and work. Sharp expanded and remodeled the house, as well as commissioning the pioneering fema