Short answers, pulled from the story.
The original DuPont Building was constructed in 1908 fronting Rodney Square in Wilmington, Delaware. It was expanded in 1913 and again in 1923, when the final addition brought the building to 13 floors and a height of 124 feet.
The DuPont Building occupies the entire block bounded by 10th, 11th, Orange, and Market streets in Wilmington, Delaware. It looks out over Rodney Square.
The DuPont Building was sold to Wilmington-based developer Buccini/Pollin in January 2018. The new owners lease office space to The Chemours Company, continue to lease The Playhouse to The Grand Opera House, and have committed to keeping Hotel du Pont operating.
Hotel du Pont is a member of Historic Hotels of America, the official program of the National Trust for Historic Preservation. The hotel is housed within the DuPont Building, having been created when part of the original 1908 section was converted during the 1913 expansion.
Joe Biden announced his candidacy for the 1972 United States Senate election in Delaware at Hotel du Pont. The hotel is located within the DuPont Building in Wilmington, Delaware.
In December 2014, DuPont announced it would move and consolidate its corporate headquarters at its nearby Chestnut Run Plaza site, under pressure from activist shareholders. The company vacated the building in early 2015, and The Chemours Company, which spun off from DuPont in 2015, moved into the space.