Winterthur is the former home of Henry Francis du Pont (1880-1969), one of America's most recognized antiques collectors and a horticulturist. In the early 20th century, H.F. du Pont and his father, Henry Algernon du Pont, designed Winterthur in the spirit of 18th and 19th - century European country houses. Winterthur is known as an iconic American treasure house, emphasizing design and style in the 175-room mansion. Winterthur Museum & Country Estate holds the world's foremost collection of American decorative arts, and is situated on a 1,000 acre estate, featuring a 60-acre garden in Delaware's beautiful Brandywine Valley.