Nemours Mansion, with its extensive landscape and numerous outbuildings, was restored under the auspices of the Nemours Foundation to ensure the estate’s continuing function as a house museum at the highest level. The Mansion and Gardens were designed by Carrere & Hastings in 1909 as the residence of the late industrialist and philanthropist Alfred I. DuPont as the largest private residence in Delaware. The French Renaissance Style Mansion contains approximately 102 rooms and is situated on 125 acres of surrounding gardens. The gardens include outbuildings, site structures and landscape features and extend for one-third of a mile along the main vista from the house. The site is widely considered as the finest example of French-style formal gardens in the United States.