Whitehall is a 75-room, 100,000 square foot Gilded Age mansion open to the public in Palm Beach, Florida in the United States. Completed in 1902, it is a major example of neoclassical Beaux Arts architecture designed by Carrère and Hastings for Henry Flagler, a leading captain of industry in the late 19th century, and a leading developer of Florida as a tourist destination. The building is listed a National Historic Landmark. It now houses the Henry Morrison Flagler Museum, named after its builder.