The Hill-Stead Museum is a Colonial Revival house and art museum set on a large estate at 35 Mountain Road in Farmington, Connecticut, USA. It is best known for its French Impressionist masterpieces, architecture, and stately grounds. The property was designated a National Historic Landmark as a nationally significant example of Colonial Revival architecture, built in 1901 to designs that were the result of a unique collaboration between Theodate Pope Riddle, one of the United States' first female architects, and the renowned firm of McKim, Mead & White.