Built on Prospect Hill Road in Cromwell in 1854, the Ebenezer W. Beckwith House is one of very few Octagon houses in Connecticut. The house served as a residence and boarding school, which by 1866 was known as the Mineral Springs Military Institute. Later, the house was rented by Dr. Winthrop B. Hallock as a retreat for the insane. In 1887, Hallock purchased the house from Beckwith’s daughter and it became the main structure of the private sanitorium known as Cromwell Hall. After Cromwell Hall closed in the 1950s, the house became the administration building for Holy Apostles College and Seminary. Various additions have been added to the building over the years, including the porte-cochere.
Ebenezer W. Beckwith House (1854)